1.

If the equation x^(3)+bx^(2)+cx+1=0, (bltc) has only one real root alpha then the value of 2tan^(-1)(cosec alpha)+tan^(-1)(2sin alpha sec^(2)alpha) is

Answer»

`-PI`
`-(pi)/2`
`(pi)/2`
`pi`

ANSWER :A


Discussion

No Comment Found