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ammu123
integrate 6cos^3(3x)
hello :) have you attempted this integral ?
there are several ways to solve this integral, one of the ways include, writing \(\cos^3 3x \) as \(\cos^2 x \times \cos x\) and do a 'u' substitution u= sin x
will you try this method ? if you get stuck, ask me, i'll help you out :)