Prove the following identities. Show all steps for full marks. a) COS Зл 2 + x = sin x AND, do only ONE of the following, your choice: b) cos(3x) = 4 cos³x - 3 cos x OR c) tan x-sin.x sin ³x secx 1 + cos x

Trigonometry (MindTap Course List)
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Author:Charles P. McKeague, Mark D. Turner
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Chapter4: Graphing And Inverse Functions
Section4.1: Basic Graphs
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Hello! I need help with this question, please provide full solutions with steps,

For b, do whichever one is easier but also do a.

Thanks!

 

Prove the following identities. Show all steps for full marks.
Зл
a) COS
( ³7 + x) =
+ x = sin x
2
AND, do only ONE of the following, your choice:
b) cos(3x) = 4 cos³x - 3 cos x
OR
c)
tan x-sin x
sin ³ x
sec x
1+ cos x
Transcribed Image Text:Prove the following identities. Show all steps for full marks. Зл a) COS ( ³7 + x) = + x = sin x 2 AND, do only ONE of the following, your choice: b) cos(3x) = 4 cos³x - 3 cos x OR c) tan x-sin x sin ³ x sec x 1+ cos x
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