Question

Write the value of $2si{n}^{-1}\frac{1}{2}+co{s}^{-1}(-\frac{1}{2})$

Answer 1

$2{\sin }^{-1}\left(\frac{1}{2}\right)+{\cos }^{-1}\left(\frac{-1}{2}\right)$

$=2\times \frac{\pi }{6}+\frac{2\pi }{3}$

$=\frac{\pi }{3}+\frac{2\pi }{3}$

$=\frac{3\pi }{3}$

$=\pi$