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x cos 5x cos 2x

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Integrate the with respect to x.

x cos 5x cos 2x

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1 Answer

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Best answer

I = ∫x cos 5x cos 2x dx

cos 3x dx = dv; v = sin 3x/3

= (x/3) sin 3x + (1/9) cos 3x ... (3) 

Substituting (2) and (3) in (1) we get,

∫x cos 5x cos 2x dx 

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