Question

найдите значение выражения : 18 arccos 1/2 - 2 arcsin ( - 1/2) + arctg корень из 3

Answer 1

arccos(1/2)=π/3.
arcsin(-1/2)=-π/6.
arctg(√3)=π/3.
18 * π/3 - 2 * (-π/6)+ π/3 = 6π +  π/3 + π/3 = 20/3 * π.