Write down the differential coefficients of \( \cos x \cos 2 x \cos 3 x, \cos ^{p} a x \cdot \co...

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Write down the differential coefficients of \( \cos x \cos 2 x \cos 3 x, \cos ^{p} a x \cdot \cos ^{q} b x \cdot \cos ^{r} c x \)
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