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    Basically that
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    (Original post by APersonYo)
    Basically that
    You could notice that \cos x is the derivative of \sin x so consider the derivative of \cos^3 x.

    Or if you're not comfortable with that approach you can susbtitute u=\sin x.
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    The function is a product so you'll need to use integration by parts, treating cosx and sin^2x separately.
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    (Original post by JaredzzC)
    The function is a product so you'll need to use integration by parts, treating cosx and sin^2x separately.
    Unlike the product rule in differentiation, integration by parts isn't useful for every product. This is a case where there is a product but parts won't help.
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    (Original post by notnek)
    You could notice that \cos x is the derivative of \sin x so consider the derivative of \cos^3 x.

    Or if you're not comfortable with that approach you can susbtitute u=\sin x.
    Merci
 
 
 
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