Question

Дайте объяснение, пожалуйста

Answer 1

1
(π-π/4)-π/4=3π/4-π/4=π/2
2
-π/4+(π-π/6)=-π/4+5π/6=7π/6
3
(π-π/3)-π/6=2π/3-π/6=π/2
4
(π-π/3)-(π-π/6)=2π/3-5π/6=-π/6