दर्शाइए कि
(i) `sin^(-1)(2xsqrt(1-x^(2)))=2sin^(-1),-(1)/(sqrt(2)) le x le (1)/(sqrt(2))`
(ii) `sin^(-1)(2xsqrt(1-x^(2)))=2cos^(-1) x,(1)/(sqrt(2)) le x le 1`

Answer

`2cos^(-1)x`