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Math Help - Indefinite Integral Problem Please

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    Indefinite Integral Problem Please

    Need some help with this please with an explanation if possible. The problem is to evaluate the indefinite integral of cosx(1 + 2sinx +sin^2x) dx. Thank you in advance!
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    Quote Originally Posted by kep84 View Post
    Need some help with this please with an explanation if possible. The problem is to evaluate the indefinite integral of cosx(1 + 2sinx +sin^2x) dx. Thank you in advance!
    \cos x (1+2\sin x + \sin^2 x) = \cos x (1+\sin x)^2 let t=1+\sin x then t' = \cos x and use substitution rule.
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