1 Find cos 0. (8,15) 1 0 [? Enter

Q: 2. Evaluate cos 0 sin 0 d0

A:

Q: 10. Find the exact value of cos 2x given that cos x =

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Q: Use the addition formula to prove cos 30 = 4cos3 0 - 3 cos0

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Q: 2. S tane sec4 0 d0

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Q: 1. Calculate ln(-/2) and acos(2).

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Q: de -1 < B< 1 (1+B cos 0)² '

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Q: -2n 1 9. Evaluate : de 6+ sine

A: Given, ∫02π16+sinθdθ=2∫0π16+sinθdθ Let us take…

Q: If cos x = and sI< 27, then tan 2x %3D

A: Given,           cosx=45 , 3π2≤x≤2π.

Q: 23-30. Prove that (tan²ß + 1) cos ß cos B is an identity equation. Solution:

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Q: snip

A: sin4θ=sin2θ2=1-cos2θ22=141+cos22θ-2cos2θ=141+1+cos4θ2-2cos2θ=14+1+cos4θ8-12cos2θ=14+18+18cos4θ-12cos…

Q: 2. Express cos(60) in terms of powers of cos only.

A:

Q: 1. The formula sinusinv 5(cos (u - v) - cos (u + v)] converts a product of sines to a of

A: sinusinv=12cosu-v-cosu+v

Q: Establish the identity cos ²(80) – sin2(80) = cos (160).

A: Given : cos28θ - sin28θ = cos16θ

Q: 73. Derive cos (u + v) = cosucos v – sinusinv by using the identity for cos (u – v) and the odd and…

A: Our Aim is to derive cos (u+v)=cos(u) cos (v)-sin (u) sin (v)-(i) by using the identity for cos…

Q: 1 + cos 20 57. Show that cos?e = 2

A: Show that the given identity, cos2θ=1+cos2θ2. Addition property:  cosA+B=cosAcosB-sinAsinB

Q: 2 cos 0 d 1 - sin A

A: We can find the integration as below.

Q: Find sec 0 if cos 0 ||

A: Our Aim is to find sec θ given that cos  θ=13

Q: 10. Prove that 7/2 sin 0 cos (cos a cosec 0) do -(1-cos a). 2 ||

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Q: 7. Give the exact answer for cos ( sin- 13

A: Consider the given expression

Q: Evaluate [ cos5x + cos4x 1. 1- 2cos3x

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Q: 1.) What is the cos(B)? 10 5/3 C 5 B. A,

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Q: 5. Verify the identity cos -(a -B)| COS we sin( B) -

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Q: Prove that cos 4 5 + cos -1 12 13 = COS 33 65

A: We have to prove cos-145+cos-11213=cos-13365

Q: 3Tt TC X+ If cos x = and <x< 2n , find the value of cos 317

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Q: ) de 1 cos330 cos830. sin³30

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Q: 4. Solve 2 cos²x - cos x = 1, x = [0, 2π] for the exact values of x in radians or two decimal places…

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Q: 1 sin4 0 = 3/7-1/10 20 + — + co cos 82 8 cos 40

A: We need to prove the given identity.

Q: 3. Express into standard form: = = 8[cos (-5) + + sin(-5)] Z i 3 3

A: Solution

Q: 2T Find the exact value of cos 3

A: given :

Q: verify that el0 + e-i0 COS %3D

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Q: (b) cos cos ( 13 ) 131 18 21 18 21 sin COS -sin 18 18

A: To evaluate the given trigonometric expression

Q: Find the exact value of cos COS 3 π 2 0 3 π 2

A: The cosine function is negative in third document.

Q: 25) n S sin (+) n s

A: