Question

Помогите с примером sin(π-α)+cos(π/2+α)+tg(α-2π)+ctg(3π/2+α)

Answer 1

Sin(π - a) + cos(π/2 + a) + tg(a-2π) +ctg(3π/2 + a) = 
= sina -sina + tga - tga = 
= 0

Answer 2

Sin(π-a)+cos(π/2+a)+tg(a-2π)+ctg(3π/2+a)=
=sina-sina+tga-tga=0