How would I prove the following reduction formula. ∫cos^n xdx=1/n (cos^n-1 x)sinx+(n-1/n) ∫cos^n-2 xdx? I know there are plenty of sites that explain this but I want an answer from a trusted source.
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Originally Posted by gammaman How would I prove the following reduction formula. ∫cos^n xdx=1/n (cos^n-1 x)sinx+(n-1/n) ∫cos^n-2 xdx? I know there are plenty of sites that explain this but I want an answer from a trusted source. Hi Let By parts with and
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