(- 1 1π/4)=θ+2kπ

θ=(- 1 1π/4)-2kπ

When k=- 1

θ=-3π/4

four

When k=0

0≤α≤π

When k=- 1

-2π≤α≤-π

five

Counterclockwise is positive and clockwise is negative.

2kπ+(π/4)≤α≤2kπ+2π-(π/3)

2kπ+(π/4)≤α≤2kπ+(5π/3)