Question

$2arcsin(\frac{-\sqrt{3} }{2} )+arctg(-1)+arcos\frac{\sqrt{2} }{2}$

Answer 1

-2pi/3 - pi/4 + pi/4 = -2pi/3

Answer 2

$2arcSin(-\frac{\sqrt{3} }{2})+arctg(-1)+arcCos\frac{\sqrt{2}}{2}=2*(-\frac{\pi }{3})-\frac{\pi }{4} +\frac{\pi }{4}=-\frac{2\pi }{3}$