1.Add or subtract. Simplify your answer if possible   1/cos \theta  - cos\theta

Q: 4. Use the power-reducing formulas to write sin?xcos²x in terms of the first powers of cosine.

A:

Q: Give the exact value of CoS 2

A: We have to find the values of angle at which the value of cosine is -32.

Q: Evaluate without using a calculator.      cos  (cos    -1 5/13)

A: coscos-1513

Q: Verify the following identity Sin3(theta) =2 sin(theta)…

A:

Q: 2) Use the fundamental identities to simplify the expression: (1 – cos? x)(csc x).

A:

Q: Evaluate without using a calculator.      cos  (cos    -1 1/2)

A: given: coscos-112 we know that coscos-1x=x

Q: 5m Evaluate sin, cos, tan of 0=

A: on solving this we get the

Q: Evaluate without using a calculator.       sec ( cos  -1 |1/5)

A: Given: seccos-115 we know that  secθ=1cosθ similarly, seccos-115=1coscos-115 we know that…

Q: A C equivalent to cos A.

A:

Q: verify that the equation is an identity. sinxcotx/cosxtanx = cot x

A: To represent the equation as an identity, the left-hand side of the equation must solve to the…

Q: Is cos (A+b)=cos A + cos(b)? Explain

A:

Q: Please show how to draw this on the quadrant.

A: Given:

Q: 2. Use your calculator and compute to 4 decimal places (a) cos(22°)

A: Part a,Given,          cos22°

Q: Verify the identity. (1-cos^2 B)(1+cot^2 B)=1

A: Topic = Trigonometry

Q: Use substitution to rewrite 4 cos^2 x=4

A:

Q: be +50 + 10 cos z)dr= %3D

A:

Q: 5. If 90° <0 < 180° and sin0 , find cos 20.

A:

Q: Express as a sum or difference.5 cos u cos 5u

A: 5cosucos 5u

Q: Find the values in

A: Given:

Q: Verify the identity by transforming the lefthand side into the right-hand side.

A: We know the standard identity: sin2A + cos2A = 1   To show: sinθ/2cscθ/2 + cosθ/2secθ/2  =  1

Q: Write the following in terms of cos θ only. sec θ

A:

Q: Evaluate without using a calculator.     cos    -1 ( cos 7pi/4)

A:

Q: Show that cos (90 degree - A) = sin A.

A: The given identity is cos90∘ -A=sinA.

Q: Expand and simplify  (cos theta - sin theta ) 2

A: Given: cosθ-sinθ2 We have to expand and simplify the given expression.

Q: Use the equivalent forms of the first Pythagorean identity If sin θ = −3/5 and θ terminates in QIII,…

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Q: Ifk = 25, what is the period of a cos ine or a sine funciton? O 45 45 25 45 45 2π

A:

Q: 5)Use De Moivre's theorem to simplify the following a)(cos 20+i sin 20)(cos 50+i sin 50)

A:

Q: Verify that the equation is an identity. 1+ cos 0 Show that (csc0+ cot0)3D 1- cos 0

A:

Q: Evaluate without using a calculator.     cos    -1 ( cos 7pi/6)

A: Given cos-1cos7π6

Q: Write (tan theta/cot theta) in terms of sin theta and cos theta

A:

Q: Suppose that a is in the first quadrant and that B = n+a. What is cos-(cos B)? COS

A: In this question we have to find cos-1cosβ

Q: Evaluate without using a calculator.       sin ( cos  -1 1/2)

A: sincos-112

Q: Suppose that cosx=a, where x is in quadrant II. Then evaluate cos(x/2+π/4)  in terms of a.

A: Given that cosx=a, x in 2nd quardinate

Q: Verify that the equation is an identity. 2 tan 1+ cos x

A: we know thatcosx=2cos2x2-1consider…

Q: simplify/evaluate cos (arctan ( 8/3 ))

A: Draw a triangle so that it has opposite=8 and adjacent=3

Q: Verify the identity by transforming the lefthand side into the right-hand side.

A: Given: Verify the identity by transforming the lefthand side into the right-hand side. We know that…

Q: Evaluate and write your answer in a + bi form. Round your decimals to the nearest tenth. [2(cos 120°…

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Q: Verify the following identities. a. cscθ - sinθ=cosθcotθ b. (1/sec+1)+(1/sec-1)=2cscθcotθ

A: We have to verify a set of trigonometric identities.

Q: 1 sed(cos")

A: ## we know that  Sec(cos^-1(x)) = 1/x

Q: Give the exact value of cos 3 (플),

A: Answer is Cos2x/3= -1/2.

Q: If cos(theta) = -1/3, and theta terminates in QIII, find cos(theta) and tan(theta)

A:

Q: Evaluate without using a calculator. tan(cos−1 9/15)

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Q: Verify the identity: (1 + cos θ)/sin θ = csc θ + cot θ.

A: Verify the identity.

Q: If c = 0.118, simplify the expression cos(cos-(c)). If undefined, enter Ø. Provide your answer…

A:

Q: Determine if the statement is true or false. cos 2A = 2 cos A

A: Given to determine if the statement is true or false. cos2A=2cosA This statement is false. For…

Q: Evaluate and write your answer in a+bia+bi form. Round your decimals to the nearest tenth.…

A:

Q: Write the following in terms of sin θ only: cos θ

A:

Fundamentals of Trigonometric Identities

Trigonometric Identities are the equalities that involve trigonometry functions and hold for all the values of variables given in the equation.