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Prove ONE of the follow sin x+ cos 2x-1 tan x %3D a) cos x-sin 2x

Prove ONE of the follow sin x+ cos 2x-1 tan x %3D a) cos x-sin 2x

Advanced Engineering Mathematics
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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5. Prove ONE of the following trigonometric identities: sin x+cos 2x–1 c) cos4x = 8cos* x-8cos²x+1 cos +x +cos 3 - x= cOs x 3 = tan x cos x-sin 2x b)
Transcribed Image Text:5. Prove ONE of the following trigonometric identities: sin x+cos 2x–1 c) cos4x = 8cos* x-8cos²x+1 cos +x +cos 3 - x= cOs x 3 = tan x cos x-sin 2x b)
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