1) tan - 2) cos 3) tan 105° 4) sin 5) sin 105° 6) tan 165° 13n 7) cos 12 8) tan 15° 9) cos 12 10) tan - 12 Simplify. tan -3x + tan 2x I) 1- tan -3atan 2x 12) cos Sucos -6u - sin Susin -6u 13) sin -xcos -3x - cos -xsin -3.x tan -4x + tan -3x 14) 1- tan -4xtan -3x 15) cos -4xcos -6x + sin -4xsin -6x 一

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A: This question is taken from trigonometry in which we have to prove the given identity  We can write…

Q: sin :) =_ co) - 87 ; cos 3

A: To find, sinπ4cos8π3

Q: 1 - cos 20 58. Show that tan? 0 1 + cos 20

A: It is known that by double angle formula, 1-cos2θ=2sin2θ1+cos2θ=2cos2θ

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A:

Q: Prove a) cos(0+0) = COSOCOS-sinesind

A: Since you have asked multiple questions in a single request so we will be answering only first…

Q: 10) cos 0 (sec 0- cos 0)

A: Given that: 10)cosθ(secθ-cosθ)12)(1-cosx)(1+secx)(cosx)

Q: 1. Prove cos 8-sin 8 cos 8 + sin e = sec 28 tan 20.

A:

Q: Show that 2 tan'e cose =3 can be written in the form 2 cos'e+3 cos e-2 =0. Hence solve equation 2. 2…

A: Let's find.

Q: Example: State whether each of the following are true or false. Justify your answer. a) sin+27=…

A: The answer provided below has been developed in a clear step by step manner.

Q: 2 cos Ca) sin Ca) da J z sin(a) cos"(a)

A: Hey, since there are multiple questions posted, we will answer one question. If you want any…

Q: k = 0, +-1, +-2, ... ) x = +- Pi/2 + kPi A) cosx+cos2x=0 B) sinx+sin2x=0 C) sin2x-cosx=0 D)…

A:

Q: 6) (section 6.2) Find the exact values of the following trigonometric expressions: sin ) 1 1T sec…

A: As per the guidelines we can solve 3 questions only.

Q: cos 8+sin e ) sec 20 + tan 20 cos 0-sin e

A:

Q: Verify the identity. cos 7x- cos 9x tan 8x sin 7x- sin 9x Statomont

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Q: tan 4 4 + cot-1 5

A: Given that: tanπ4+cot-145

Q: Given rhat deri ve formula cos (A+B) = COSA COSB COSCA -B) Sina sinB, for Sin (A+B) (Henr:…

A: Since the student has posted multiple questions and does not mention any specific question, so we…

Q: 1+cos 4x Express without double angles. sin 4x O (cot a + tan x) O ÷(cos x 글 (cos sin x) - O (cot a…

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Q: SOLVE (1+ tan 0 + sec0)(1+cot0 – csc0)

A:

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A:

Q: verify the identity 1-2sec theta-3 (sec theta)2/-(tan theta)2 = 1-3sec theta/1-sec theta

A: We have to use Pythagorean identity

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A:

Q: 13 If sec0 5 Show that 2 sin 0-3cos0 3D3 4 sin 0 –9 cos0

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Q: The value of the expression cos a tan x – 4 + sin x + sec? a is O 8 tanx O -8 csC x 8 sec x

A: