Solve Solve cos2 sin1 x 1 for xSolutioncos 2 sin1 x 1 le

Solve.

Solution

cos ( 2 sin^-1 x ) = 1

let sin^-1 x= y

sin y = x

cos ( 2y ) = 1

cos^2 y - sin^2 y = 1

1 can be written as

cos^2y + sin^2 y

cos^2y - sin^2 y = cos^2y + sin^2 y

y = 0

hence , x = 0

solution is x = 0