f(x) =(sin^(-1)x)^2+(Cos^(-1)x)^2 is sta...

`f(x) =(sin^(-1)x)^2+(Cos^(-1)x)^2` is stationary at

A

`x=1/sqrt2`

B

`x=pi/4`

C

`x=1`

D

`x=0`

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