The fixed point iteration x n+1 = cos(x n) with initial value x 0 = −1 converges to the Dottie number. Zero is the only real fixed point of the sine function; in other words the only intersection of the sine function and the identity function is sin ( 0 ) = 0 {\displaystyle \sin(0)=0} . The Cosine function ( cos (x) ) The cosine is a trigonometric function of an angle, usually defined for acute angles within a right-angled triangle as the ratio of the length of the adjacent side to the hypotenuse. It is the complement to the sine. In the illustration below, cos (α) = b/c and cos (β) = a/c. Compute answers using Wolfram's breakthrough technology & knowledgebase, relied on by millions of students & professionals. For math, science, nutrition, history ... Jul 24, 2018 · The equation is. cosx − 1 = − cosx. ⇒, 2cosx = 1. ⇒, cosx = 1 2. The solutions are. {x = π 3 + 2kπ x = 5 3π +2kπ, ∀k ∈ Z. Answer link. sin2x +cos2x = 1. where we can subtract cos2x from both sides to get what we have in blue above: sin2x = 1 − cos2x. Thus, this expression is equal to. sin2x. All we did was use the difference of squares property to our advantage, recognize that the expression we had is derived from the Pythagorean Identity, use it, and simplify. Hope this helps!Solve for x cos(x)(cos(x)-1)=0. Step 1. If any individual factor on the left side of the equation is equal to , the entire expression will be equal to . Step 2.Free math problem solver answers your algebra, geometry, trigonometry, calculus, and statistics homework questions with step-by-step explanations, just like a math tutor. Compute answers using Wolfram's breakthrough technology & knowledgebase, relied on by millions of students & professionals. For math, science, nutrition, history ...We would like to show you a description here but the site won’t allow us.What is tan 30 using the unit circle? tan 30° = 1/√3. To find this answer on the unit circle, we start by finding the sin and cos values as the y-coordinate and x-coordinate, respectively: sin 30° = 1/2 and cos 30° = √3/2. Now use the formula. Recall that tan 30° = sin 30° / cos 30° = (1/2) / (√3/2) = 1/√3, as claimed.Free math problem solver answers your algebra, geometry, trigonometry, calculus, and statistics homework questions with step-by-step explanations, just like a math tutor.Solve for x cos (x)=1. cos (x) = 1 cos ( x) = 1. Take the inverse cosine of both sides of the equation to extract x x from inside the cosine. x = arccos(1) x = arccos ( 1) Simplify the right side. Tap for more steps... x = 0 x = 0. The cosine function is positive in the first and fourth quadrants. To find the second solution, subtract the ... Precalculus. Simplify (1-cos (x))/ (cos (x)) Step 1. Nothing further can be done with this topic. Please check the expression entered or try another topic. 1. You may get numerical errors because cosh (x) grows very quickly. Write the equation as. cos(x) = 1 coshx cos ( x) = 1 cosh x, When x x is large, the solutions are going to be approximately. cos(x) = 0 cos ( x) = 0. *** cos(x) cosh(x) − 1 = 0 cos ( x) cosh ( x) − 1 = 0 is the frequency equation of an Euler-Bernoulli beam under free-free ...cos x = 1 / (sec x) Cosine Formulas Using Pythagorean Identity. One of the trigonometric identities talks about the relationship between sin and cos. It says, sin 2 x + cos 2 x = 1, for any x. We can solve this for cos x. Consider sin 2 x + cos 2 x = 1. Subtracting sin 2 x from both sides, cos 2 x = 1 - sin 2 x. Taking square root on both sides ...Compute answers using Wolfram's breakthrough technology & knowledgebase, relied on by millions of students & professionals. For math, science, nutrition, history ...My origin equation is 2 x^2 (-1 + Cos[x] Cosh[x]) == 0, how could I know I should first divide the equation by x^2, before applying your code on big x approximation.When cos x = 1, what does x equal? Trigonometry Trigonometric Identities and Equations Solving Trigonometric Equations 1 Answer George C. · Ratnaker Mehta Sep 30, 2016 x can be any integer multiple of 2π, including 0 Explanation: The function cos(x) has period 2π and cos(0) = 1 Hence: cos(2nπ) = 1 for any integer n graph {cos (x) [-10, 10, -5, 5]}Free math problem solver answers your algebra, geometry, trigonometry, calculus, and statistics homework questions with step-by-step explanations, just like a math tutor.We will begin by multiplying 1 cosx − 1 by the conjugate of cosx − 1, which is cosx + 1: 1 cosx − 1 ⋅ cosx + 1 cosx + 1. You may wonder why we do this. It's so we can apply the difference of squares property, (a −b)(a +b) = a2 −b2, in the denominator, to simplify it a little. Back to the problem:cos^-1(x) Natural Language; Math Input; Extended Keyboard Examples Upload Random. Compute answers using Wolfram's breakthrough technology & knowledgebase, relied on ... We would like to show you a description here but the site won’t allow us.Fleur Jul 5, 2017 graph{cos x + 1 [-10, 10, -5, 5]} If you graph the function, you can see that the domain includes all real numbers, and the range includes all values from 0 to 2, ...Sep 19, 2017 · Explanation: since cosx > 0. then x will be in the first/fourth quadrants. cosx = 1 2. ⇒ x = cos−1(1 2) = π 3 ← angle in first quadrant. or x = (2π − π 3) = 5π 3 ← angle in fourth quadrant. Answer link. What is tan 30 using the unit circle? tan 30° = 1/√3. To find this answer on the unit circle, we start by finding the sin and cos values as the y-coordinate and x-coordinate, respectively: sin 30° = 1/2 and cos 30° = √3/2. Now use the formula. Recall that tan 30° = sin 30° / cos 30° = (1/2) / (√3/2) = 1/√3, as claimed.cos^2 x + sin^2 x = 1. sin x/cos x = tan x. You want to simplify an equation down so you can use one of the trig identities to simplify your answer even more. some other identities (you will learn later) include -. cos x/sin x = cot x. 1 + tan^2 x = sec^2 x. 1 + cot^2 x = csc^2 x. hope this helped! My origin equation is 2 x^2 (-1 + Cos[x] Cosh[x]) == 0, how could I know I should first divide the equation by x^2, before applying your code on big x approximation.The fixed point iteration x n+1 = cos(x n) with initial value x 0 = −1 converges to the Dottie number. Zero is the only real fixed point of the sine function; in other words the only intersection of the sine function and the identity function is sin ( 0 ) = 0 {\displaystyle \sin(0)=0} . In looking through the ways to find the limit of (1-cos(x)) / x, we looked into a couple methods. The first method is the plug-in method, which involves simply plugging a into (1-cos(x)) / x for x.Jun 24, 2016 · This can be done by the useful technique of differentiating under the integral sign. In fact, this is exercise 10.23 in the second edition of "Mathematical Analysis" by Tom Apostol. sin2x +cos2x = 1. where we can subtract cos2x from both sides to get what we have in blue above: sin2x = 1 − cos2x. Thus, this expression is equal to. sin2x. All we did was use the difference of squares property to our advantage, recognize that the expression we had is derived from the Pythagorean Identity, use it, and simplify. Hope this helps!The inverse of sine is denoted as arccos or cos-1 x. For a right triangle with sides 1, 2, and √3, the cos function can be used to measure the angle. In this, the cos of angle A will be, cos(a)= adjacent/hypotenuse.Free Pre-Algebra, Algebra, Trigonometry, Calculus, Geometry, Statistics and Chemistry calculators step-by-stepFirst of all, note that implicitly differentiating cos(cos−1x)= x does not prove the existence of the derivative of cos−1 x. What it does show, however, ... By definition we have that for x ∈ [0,2π] for 0 ≤ x≤ π cos−1 cosx = x for π< x ≤ 2π cos−1 cosx = 2π−x and this is periodic with period T = 2π. Thus it ...Aug 20, 2015 · sec A = 1/cos A tan A = sin A/cos A sin^2 A + cos^2 A = 1 sec x + tan x = (1+sin x)/cos x = ((1+sin x)(1-sin x))/(cos x(1-sin x)) = (1-sin^2 x)/(cos x(1-sin x)) = cos ... Introduction to Trigonometric Identities and Equations; 7.1 Solving Trigonometric Equations with Identities; 7.2 Sum and Difference Identities; 7.3 Double-Angle, Half-Angle, and Reduction Formulas In mathematics, the trigonometric functions (also called circular functions, angle functions or goniometric functions [1] [2]) are real functions which relate an angle of a right-angled triangle to ratios of two side lengths. E 1 (sin x, cos x, tan x) = E 2 (sin x, cos x, tan x) Where E 1 and E 2 are rational functions. Since sine, cosine and tangent are the major trigonometric functions, hence the solutions will be derived for the equations comprising these three ratios. However, the solutions for the other three ratios such as secant, cosecant and cotangent can be ... Explanation: In the trigonometric circle you will notice that cos (x)=0 corresponds to x = π 2 and also x = − π 2. Additionally to these all the angles that make a complete turn of the circle ( 2kπ) plus ± π 2 correspond to cos (x)=0. So you have: x = ± π 2 +2kπ,k ∈ Z. If you try to see which are the first elements (from k =0, 1,2 ...Pythagorean identities Trigonometric functions and their reciprocals on the unit circle. All of the right-angled triangles are similar, i.e. the ratios between their corresponding sides are the same. For sin, cos and tan the unit-length radius forms the hypotenuse of the triangle that defines them.1) In the unit circle the x represent the cosine of the function and the y represent the sine of the trigonometric function. 2) Looking at the unit circle I noticed that cos (x) =1, corresponds to 360°. in other words cos (360º) =1, the answer is x=360º or x=2π radians. 3) you can check your answer in your graphing calculator by pressing ...Free trigonometric equation calculator - solve trigonometric equations step-by-stepTrigonometric Identities Resources · Cool Tools · Formulas & Tables · References · Test Preparation · Study Tips · Wonders of Math Search Trigonometric Identities ( Math | Trig | Identities) sin (-x) = -sin (x) csc (-x) = -csc (x) cos (-x) = cos (x) sec (-x) = sec (x) tan (-x) = -tan (x) cot (-x) = -cot (x)Jun 24, 2016 · Hero and Nghi, I think I could invoke more interest by including the. solutions for cosx − sinx = 1, and for that matter, secx ± tanx = 1, that become. cosx − sinx = 1 and cosx +sinx = 1, upon multiplication by. cos x, when x ≠ an odd multiple of π 2. For cos x - sin x = 1, the general solution is. x = 2nπ and x = (4n − 1) π 2,n = 0 ... The equation is. cosx − 1 = − cosx. ⇒, 2cosx = 1. ⇒, cosx = 1 2. The solutions are. {x = π 3 + 2kπ x = 5 3π +2kπ, ∀k ∈ Z. Answer link.Multiply by 1 + cosx 1 + cosx to get. 1 − cos2x x(1 + cosx) = sin2x x(1 +cosx) = sinx ⋅ sinx x ⋅ 1 1 + cosx. Taking the limit as x → 0 gives. (0)(1)(1 2) = 0. Answer link.Graph y=cos(x-1) Step 1. Use the form to find the variables used to find the amplitude, period, phase shift, ... Step 6.5.1. Replace the variable with in the expression. Jan 31, 2017 · 1. Hint The appearance of 1 + cos x 1 + cos x suggests we can produce an expression without a constant term in the denominator by substituting x = 2t x = 2 t and using the half-angle identity cos2 t = 12(1 + cos 2t) cos 2 t = 1 2 ( 1 + cos 2 t). Share. Write each expression with a common denominator of (1−cos(x))(1+ cos(x)) ( 1 - cos ( x)) ( 1 + cos ( x)), by multiplying each by an appropriate factor of 1 1. Tap for more steps... Combine the numerators over the common denominator. Simplify the numerator.Cos x = -1. Cách giải phương trình cos x = a (*) B. Phương trình lượng giác thường gặp. Cách giải phương trình lượng giác cơ bản đưa ra phương pháp và các ví dụ cụ thể, giúp các bạn học sinh THPT ôn tập và củng cố kiến thức về dạng toán hàm số lượng giác 12. Tài liệu ...First sketch 1-cos x then x. Determine where functions 1-cos x and x are positive and negative to determine where (1-cos x)/x will be positive and negative. Find any asymptotes (x=0). To help sketch determin whether the function is odd and even. If required check for concavity using the second derivative as well as max and minimumsWrite each expression with a common denominator of (1+cos(x))(1− cos(x)) ( 1 + cos ( x)) ( 1 - cos ( x)), by multiplying each by an appropriate factor of 1 1. Tap for more steps... Combine the numerators over the common denominator. Simplify the numerator.Use the form asec(bx−c)+ d a sec ( b x - c) + d to find the variables used to find the amplitude, period, phase shift, and vertical shift. a = 1 a = 1. b = 1 b = 1. c = 0 c = 0. d = 0 d = 0. Since the graph of the function sec s e c does not have a maximum or minimum value, there can be no value for the amplitude. Amplitude: None.When cos x = 1, what does x equal? Trigonometry Trigonometric Identities and Equations Solving Trigonometric Equations 1 Answer George C. · Ratnaker Mehta Sep 30, 2016 x can be any integer multiple of 2π, including 0 Explanation: The function cos(x) has period 2π and cos(0) = 1 Hence: cos(2nπ) = 1 for any integer n graph {cos (x) [-10, 10, -5, 5]}Explanation: In the trigonometric circle you will notice that cos (x)=0 corresponds to x = π 2 and also x = − π 2. Additionally to these all the angles that make a complete turn of the circle ( 2kπ) plus ± π 2 correspond to cos (x)=0. So you have: x = ± π 2 +2kπ,k ∈ Z. If you try to see which are the first elements (from k =0, 1,2 ...1 Answer. Chandra S. Aug 14, 2015. cos x = - 1/2 = cos 2 π /3 ⇒ x = 2 π /3.Solve for ? cos (x)=1/2. cos (x) = 1 2 cos ( x) = 1 2. Take the inverse cosine of both sides of the equation to extract x x from inside the cosine. x = arccos(1 2) x = arccos ( 1 2) Simplify the right side. Tap for more steps... x = π 3 x = π 3. The cosine function is positive in the first and fourth quadrants. Solve for x cos (x)=-1. cos (x) = −1 cos ( x) = - 1. Take the inverse cosine of both sides of the equation to extract x x from inside the cosine. x = arccos(−1) x = arccos ( - 1) Simplify the right side. Tap for more steps... x = π x = π. The cosine function is negative in the second and third quadrants. To find the second solution ... VDOM DHTML tml>. What is 1+cosx=? - Quora. Something went wrong. Wait a moment and try again.Precalculus. Simplify (1-cos (x))/ (cos (x)) Step 1. Nothing further can be done with this topic. Please check the expression entered or try another topic. Dec 9, 2014 · My origin equation is 2 x^2 (-1 + Cos[x] Cosh[x]) == 0, how could I know I should first divide the equation by x^2, before applying your code on big x approximation. Found 2 solutions by josgarithmetic, Boreal: Answer by josgarithmetic (38702) ( Show Source ): You can put this solution on YOUR website! Answer by Boreal (15207) ( Show Source ): You can put this solution on YOUR website! cosx/ (1+sinx) cos x (1-sinx)/ [ (1+sinx) (1-sinx)] ;; multiply by (1-sin x/1-sin x) cosx-sinxcosx/ (1-sin^2x) ;;; 1-sin^2x ... What is tan 30 using the unit circle? tan 30° = 1/√3. To find this answer on the unit circle, we start by finding the sin and cos values as the y-coordinate and x-coordinate, respectively: sin 30° = 1/2 and cos 30° = √3/2. Now use the formula. Recall that tan 30° = sin 30° / cos 30° = (1/2) / (√3/2) = 1/√3, as claimed.Trigonometry Solve for ? cos (x)=-1 cos (x) = −1 cos ( x) = - 1 Take the inverse cosine of both sides of the equation to extract x x from inside the cosine. x = arccos(−1) x = arccos ( - 1) Simplify the right side. Tap for more steps... x = π x = π The cosine function is negative in the second and third quadrants.Compute answers using Wolfram's breakthrough technology & knowledgebase, relied on by millions of students & professionals. For math, science, nutrition, history ...Write each expression with a common denominator of (1−cos(x))(1+ cos(x)) ( 1 - cos ( x)) ( 1 + cos ( x)), by multiplying each by an appropriate factor of 1 1. Tap for more steps... Combine the numerators over the common denominator. Simplify the numerator.The first step is to multiply the two expressions between parentheses : (II) There is a trigonometric identity that states : Working with this expression : ⇒. (I) Using the equation (I) in (II) : ⇒. arrow right.Period of a solution in a trigonometric equation https://math.stackexchange.com/questions/1297742/period-of-a-solution-in-a-trigonometric-equation sin and cos have period 2π and tan has period π. When solving an equation, make sure to list all roots in a period. tanx =0 x = 0 in [0,π), i.e. x = kπ. tanx = 1 x= 4π ...Free math problem solver answers your algebra, geometry, trigonometry, calculus, and statistics homework questions with step-by-step explanations, just like a math tutor. The Cosine function ( cos (x) ) The cosine is a trigonometric function of an angle, usually defined for acute angles within a right-angled triangle as the ratio of the length of the adjacent side to the hypotenuse. It is the complement to the sine. In the illustration below, cos (α) = b/c and cos (β) = a/c. VDOM DHTML tml>. What is the formula of 1+cosx? - Quora. Something went wrong.1. Hint The appearance of 1 + cos x 1 + cos x suggests we can produce an expression without a constant term in the denominator by substituting x = 2t x = 2 t and using the half-angle identity cos2 t = 12(1 + cos 2t) cos 2 t = 1 2 ( 1 + cos 2 t). Share.Method 2: Note that: $$ \int_{y=0}^\infty e^{-(x^2+4)y}\,dy=\frac{1}{x^2+4}, $$ therefore $$ \int_{x=0}^\infty\int_{y=0}^\infty e^{-(x^2+4)y}\cos2x\,dy\,dx=\int_0 ...1. You may get numerical errors because cosh (x) grows very quickly. Write the equation as. cos(x) = 1 coshx cos ( x) = 1 cosh x, When x x is large, the solutions are going to be approximately. cos(x) = 0 cos ( x) = 0. *** cos(x) cosh(x) − 1 = 0 cos ( x) cosh ( x) − 1 = 0 is the frequency equation of an Euler-Bernoulli beam under free-free ...May 24, 2015 · Use the identity: cos (a + b) = cos a.cos b - sin a.sin b cos 2x = cos (x + x) = cos x.cos x - sin x. sin x = cos^2 x - sin^2 x = = cos^2 x - (1 - cos^2 x) = 2cos ^2 ... May 29, 2023 · Learn in your speed, with individual attention - Teachoo Maths 1-on-1 Class. Book a free demo. Transcript. Show More. Next: Ex 7.3, 10 Important → Ask a doubt Method 2: Note that: $$ \int_{y=0}^\infty e^{-(x^2+4)y}\,dy=\frac{1}{x^2+4}, $$ therefore $$ \int_{x=0}^\infty\int_{y=0}^\infty e^{-(x^2+4)y}\cos2x\,dy\,dx=\int_0 ...cos^-1(x) Natural Language; Math Input; Extended Keyboard Examples Upload Random. Compute answers using Wolfram's breakthrough technology & knowledgebase, relied on ... When cos x = 1, what does x equal? Trigonometry Trigonometric Identities and Equations Solving Trigonometric Equations 1 Answer George C. · Ratnaker Mehta Sep 30, 2016 x can be any integer multiple of 2π, including 0 Explanation: The function cos(x) has period 2π and cos(0) = 1 Hence: cos(2nπ) = 1 for any integer n graph {cos (x) [-10, 10, -5, 5]}cos^-1(x) Natural Language; Math Input; Extended Keyboard Examples Upload Random. Compute answers using Wolfram's breakthrough technology & knowledgebase, relied on ... Step 1: The first thing we want to do is look at the functions in the numerator and denominator. By inspection, we see that the values for f (x) and g (x) would be 1 and tan (x), respectively ...Arccos. Arccosine, written as arccos or cos -1 (not to be confused with ), is the inverse cosine function. Both arccos and cos -1 are the same thing. Cosine only has an inverse on a restricted domain, 0 ≤ x ≤ π. In the figure below, the portion of the graph highlighted in red shows the portion of the graph of cos (x) that has an inverse.cos( ) = x 1 = x sec( ) = 1 x tan( ) = y x cot( ) = x y FactsandProperties Domain Thedomainisallthevaluesof thatcanbe pluggedintothefunction. sin( ), canbeanyangleJul 31, 2019 · 1) In the unit circle the x represent the cosine of the function and the y represent the sine of the trigonometric function. 2) Looking at the unit circle I noticed that cos (x) =1, corresponds to 360°. in other words cos (360º) =1, the answer is x=360º or x=2π radians. 3) you can check your answer in your graphing calculator by pressing ... Solve for x cos (x)=1. cos (x) = 1 cos ( x) = 1. Take the inverse cosine of both sides of the equation to extract x x from inside the cosine. x = arccos(1) x = arccos ( 1) Simplify the right side. Tap for more steps... x = 0 x = 0. The cosine function is positive in the first and fourth quadrants. To find the second solution, subtract the ... VDOM DHTML tml>. What is the formula of 1+cosx? - Quora. Something went wrong.In mathematics, the trigonometric functions (also called circular functions, angle functions or goniometric functions [1] [2]) are real functions which relate an angle of a right-angled triangle to ratios of two side lengths.
קוסינוס (מסומן ב- ) היא פונקציה טריגונומטרית בסיסית, המתאימה לכל זווית מספר ממשי בין (1-) ל-1. הרחבות שונות של הפונקציה משמשות במגוון תחומים, כגון: הגדרות שונות ב אנליזה (ובפרט ב אנליזה מרוכבת ... . Bismarck funeral home and crematory obituaries
Ex 7.3, 8 1 − 𝑐𝑜𝑠 𝑥1 + 𝑐𝑜𝑠 𝑥 1 − cos𝑥1 + cos𝑥 We know that Thus, our equation becomes 1 − cos𝑥1 + cos𝑥 𝑑𝑥= 2 sin2 𝑥22 cos2 𝑥2 = sin2 𝑥2 cos2 𝑥2 𝑑𝑥 = tan2 ...Trigonometric Identities Resources · Cool Tools · Formulas & Tables · References · Test Preparation · Study Tips · Wonders of Math Search Trigonometric Identities ( Math | Trig | Identities) sin (-x) = -sin (x) csc (-x) = -csc (x) cos (-x) = cos (x) sec (-x) = sec (x) tan (-x) = -tan (x) cot (-x) = -cot (x)Graph y=cos(x-1) Step 1. Use the form to find the variables used to find the amplitude, period, phase shift, and vertical shift. Step 2. Find the amplitude . Amplitude:E 1 (sin x, cos x, tan x) = E 2 (sin x, cos x, tan x) Where E 1 and E 2 are rational functions. Since sine, cosine and tangent are the major trigonometric functions, hence the solutions will be derived for the equations comprising these three ratios. However, the solutions for the other three ratios such as secant, cosecant and cotangent can be ...1) In the unit circle the x represent the cosine of the function and the y represent the sine of the trigonometric function. 2) Looking at the unit circle I noticed that cos (x) =1, corresponds to 360°. in other words cos (360º) =1, the answer is x=360º or x=2π radians. 3) you can check your answer in your graphing calculator by pressing ...The answer is related to the length of a side of a regular n -gon inscribed into a unit-radius circumference; because the perimeter of the n -gon is always less than 2π, the single side must always be less than 2π / n. The inequality. 1 − cos(x) ≤ x2 2 (1) is used and the proof is completed with. 2(1 − cos(x)) ≤ (2π / n)2.cos^2 x + sin^2 x = 1. sin x/cos x = tan x. You want to simplify an equation down so you can use one of the trig identities to simplify your answer even more. some other identities (you will learn later) include -. cos x/sin x = cot x. 1 + tan^2 x = sec^2 x. 1 + cot^2 x = csc^2 x. hope this helped! Trigonometry Solve for ? cos (x)=-1 cos (x) = −1 cos ( x) = - 1 Take the inverse cosine of both sides of the equation to extract x x from inside the cosine. x = arccos(−1) x = arccos ( - 1) Simplify the right side. Tap for more steps... x = π x = π The cosine function is negative in the second and third quadrants.Found 2 solutions by josgarithmetic, Boreal: Answer by josgarithmetic (38702) ( Show Source ): You can put this solution on YOUR website! Answer by Boreal (15207) ( Show Source ): You can put this solution on YOUR website! cosx/ (1+sinx) cos x (1-sinx)/ [ (1+sinx) (1-sinx)] ;; multiply by (1-sin x/1-sin x) cosx-sinxcosx/ (1-sin^2x) ;;; 1-sin^2x ...The fixed point iteration x n+1 = cos(x n) with initial value x 0 = −1 converges to the Dottie number. Zero is the only real fixed point of the sine function; in other words the only intersection of the sine function and the identity function is sin ( 0 ) = 0 {\displaystyle \sin(0)=0} . Jan 26, 2017 · Explanation: Use the identity: secx = 1 cosx. 1 secx = 1 1 cosx = 1 ⋅ cosx 1 = cosx. Answer link. .
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