Вычислить: 2tg (-π/4) ctg (-π/4) +3sin (-π/2) +5cos (-π/6)

Question

Вычислить:
2tg (-π/4) ctg (-π/4) +3sin (-π/2) +5cos (-π/6)

Answer 1

2*(-1)*(-1)+3*(-1)+(5*√3)/2=2-3+(5√3)/2=-1+(5√3)/2