Question

Помогите Решить триганометрию

Answer 1

$2arcSin(-\frac{1}{2})-arcCtg(-\sqrt{3} )+3arcCos(-\frac{\sqrt{3} }{2})+arcSin(-1)=2*(-\frac{\pi }{6})-\frac{5\pi }{6}+3*\frac{5\pi }{6}+(-\frac{\pi }{2})=-\frac{\pi }{3}-\frac{5\pi }{6}+\frac{5\pi }{2}-\frac{\pi }{2}=\frac{-2\pi-5\pi +15\pi-3\pi}{6}=\frac{5\pi }{6}$