If 20 is in QII and cos 36 cos 0+ sin 30 sin 0 = then sin 20 is equal to 2 O V2 O V3 2 0 1 o 1

Q: 3. Which expression is equal to 02 O O O O 1 -1 -2 sinx-cos X sin² x-cos²x using identities?

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Q: sin (+) can be expanded to: π TT O sin COS sin sin 4 7 TT O sin sin COS cos 4 T Osin COS + cos sin…

A: Solved below.

Q: Find the exact value of each expression. 1) cos-0 V3 3) cos- 5) sin- -1 7) cos-1 1 9) sin- 1 11) cos

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Q: de -1 < B< 1 (1+B cos 0)² '

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Q: sin e cos (cos a cosec 0) de (1-cos a). 2 ||

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Q: 2) cos² I 6 F/6 sin2 T

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Q: 7T 12 COS COS 뜸 + sin sin 5T 12

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Q: 4 and cos b= 2/5 sin b = V5 Given sin a = cos a = - find sin(a + b) SATO O_2V5 25 2/5 25 O 11V5 25

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Q: 1- sin 3 Cos B 1+ sin 8 Cos 3

A: We have prove the identity 1-sinβcosβ=cosβ1+sinβ , using trigonometric properties or mathematical…

Q: 2 2 cos 0 d0 V1 – sin 0

A: Given:        ∫0π2cosθ1-sinθdθ substitute u=1-sinθ→dudθ=-cosθ→dθ=-1cosθdθ      =∫10-1udu…

Q: If sin z + cos I 2, then the value of sin" r+ cos" z will be-

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Q: Show that sin² 0 cos² 0 8 1 cos (40). 8

A: To show that: sin2θcos2θ=18-18cos(4θ) Solution: We know: 2sinxcosx=sin(2x)    ..(1)cos(2x)=1-2sin2x…

Q: Find the exact value of 23л sin 30 17 237 17 COS + cos sin 30 30 30

A: Let's find.

Q: Find cos 20 if sin 0 = cos 20

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Q: verify the identity seco+1 2 COS 2 - 2 sec 0

A: Verify the identity: cos2θ2=secθ+12secθ

Q: 2 sin (45)+ 4 cos A 3

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Q: 2 sin- If p = cos -1 q, show that 4p? – 4pt + q? = 1.

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Q: b) (2 cos² B-1)² cos4 B-sin4 B = 1-2 sin² ß

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Q: sin z sin- is equal to 2

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Q: 1 then sin 20 is equal to 2 If 20 is in QIl and cos 30 cos 0 + sin 30 sin 0 V3 1 1

A: The given trigonometric problem is solved below in detail.

Q: 1 minus the fraction of cos squared theta/ 1 plus sin of theta

A: Use Pythagorean identity sin^2 theta + cos^2 theta=1  This gives, cos^2 theta = 1 - sin^2 theta

Q: 2 sin COS

A: we use the formula :Sin 2θ = 2 sinθ cosθ.

Q: Which of the following is an equivalent expression to sin 8-(sin )(cos²0)?

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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