1.

The value of `tan[cos^(-1)(4/5)+tan^(-1)(2/3)]`is`6/(17)`(b) `7/(16)`(c) `(16)/7`(d) none of these

Answer» LHS
`tan[tan^(-1)3/4+tan^(-1)2/3]`
`tan[tan^(-1)((3/4)+(2/3))/(1-(3/4)(2/3))]`
`tan[tan^(-1)(17/6)]`
`=17/6`.


Discussion

No Comment Found