√99以上 y=sin^-1(2x/1 x^2) sec^-1(1 x^2/1-x^2) 130099-Sin 2x 1 cos2x 2

First, use the positive value of the ± ± to find the first solution sin ( x) = √ 2 2 sin ( x) = 2 2 Next, use the negative value of the ± ± to find the second solution sin ( x) = − √ 2 2 sin ( x) = 2 2 The complete solution is the result of both the positive and negative portions of the solution