1.

int_(0)^(pi//2) (dx)/( 2 cos x+ 3) is equal to

Answer»

`(2)/( sqrt5) TAN^(-1) (1)/( sqrt5)`
`(1)/( sqrt5) tan^(-1) (1)/(sqrt5)`
`1`
`(2)/( SQRT3) tan^(-1) (1)/( sqrt5)`

Answer :A


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