Math, asked by shifaaps5608, 1 year ago

Prove cos 2x cos x by 2 minus cos 3 x cos 9 x by 2 = sin 5x sin 5x light

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Answered by xxZUBAKOxx

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Step-by-step explanation:

Prove cos 2x cos x by 2 minus cos 3 x cos 9 x by 2 = sin 5x sin 5x light

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