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Question
Integrate the functions:
`sin x/(1+ cos x)`
Solution
Let `I = int (sin x)/(1 + cos x) dx`
Put 1 + cos x = t
⇒ -sin x dx = dt
∴ `I = - int dt/t = -log |t| + C `
= - log |1 + cos x| + C
`= log (1/ (|1 + cos x|)) + C`
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