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Maximum value of function `f(x)=(sin^(-1)(sinx)^(2)-sin^(-1)(sinx)` is:A. `(pi)/(4)[pi+2]`B. `(pi)/(4)[pi-2]`C. `(pi)/(2)[pi+2]`D. `(pi)/(2)[pi-2]`

Answer» Correct Answer - A
`y=(sin^(-2)(sin x))^(2)-sin^(-1)(sin x)`
`=(sin^(-1)(sin x)-(1)/(2))^(2)-(1)/(4)`
For maximum value of `y, sin^(-1)(sin x)=-(pi)/(2)`
`rArr y =((pi)/(2)+(1)/(2))^(2)-(1)/(4)=(pi)/(4)(pi+2)`


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