If 15x= ,prove that cos x cos 2x cos 3x cos 4x cos 5x cos6x cos7x=1/2^7 - Maths - Trigonometry

Question

If 15x=?,prove that cos x cos 2x cos 3x cos 4x cos 5x cos6x
cos7x=1/2^7

Neha Sethi · Accepted Answer

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If 15x=?,prove that cos x cos 2x cos 3x cos 4x cos 5x cos6x cos7x=1/2^7