In Exercises 11-51

MATHEMATICS · Subjective · A Level · Mathematics · Trigonometry · Trigonometry

Problem

In Exercises 11-51, prove the identity. 43. cos⁡5x=(1−2sin⁡2x+sin⁡4x)(cos⁡x)\cos ^{5} x=\left(1-2 \sin ^{2} x+\sin ^{4} x\right)(\cos x)

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