Ctg(3arccos(-1)-arcsin(-1/2))

Question

Ctg(3arccos(-1)-arcsin(-1/2))

Answer 1

Решение
Ctg(3arccos(-1)-arcsin(-1/2)) = ctg[(3*π) - (- π/6)] = ctg(19π/6) = ctg(2π + π/6) = 
= ctg(π/6) = √3