Question

5arcsin 1/2 -9 arccos √3/2 +4 arctg 1

Answer 1

= 5*$frac{ pi }{6}$ - 9*$frac{ pi }{6}$ + 4*$frac{ pi }{4}$ = -4*$frac{ pi }{6}$ + π = $frac{-4 pi +6 pi }{6}$ = $frac{2 pi }{6}$=$frac{ pi}{3}$