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Question
Find the integrals of the function:
`(sin^2 x)/(1 + cos x)`
Solution
Let `I = int (sin^2 x)/(1 + cos x) dx`
`= int (1 - cos^2 x)/(1+ cos x) dx`
`= int ((1 - cos x) (1 + cos x))/(1 + cos x) dx`
`= int (1 - cos x) dx`
`= int 1 dx - int cos x dx`
`= x - sin x + C`
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