1.

If int(sinx)/(cosx(1+cosx))dx = f(x)+c, then f(x) is equal to

Answer»

`|(1-COSX)/(cosx)|`
`LOG|(cosx)/(1+cosx)|`
`|(SINX)/(1+sinx)|`
`log|(1+sinx)/(sinx)|`

ANSWER :A


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