1.

int ((1-sin x )/( 1- cos x )) e^(x) dx is equal to

Answer»

` - e^(X)tan""( x)/( 2) + C`
`- e^(x) cot ""(x)/(2) +C`
`- ( 1)/( 2) e^(x) tan""(x)/(2) +C`
`- (1)/(2) e^(x) cot ""(x)/(2) +C`

Answer :B


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