1.

int(dx)/(1+cosa cosx)=

Answer»

`(1)/(sina)TAN^(-1)(tan((X)/(2))tan((a)/(2)))+c`
`(2)/(sina)tan^(-1)(tan((x)/(2))tan((a)/(2)))+c`
`(1)/(COSA)tan^(-1)(tan((x)/(2))tan((a)/(2)))+c`
`(2)/(cosa)tan^(-1)(tan((x)/(2))COT((a)/(2)))+c`

Answer :B


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