Trigonometry
Find the exact solution of the equation.
sin−1x+sec−1x=π2\sin^{-1}x+\sec^{-1}x=\frac{\pi}{2}sin−1x+sec−1x=2π
{1}\left\lbrace1\right\rbrace{1}
{−1}\left\lbrace-1\right\rbrace{−1}
{−1,1}\left\lbrace-1,1\right\rbrace{−1,1}
No solution