Finding Coterminal Angles

Section 4.1

 

16 b.

one must be positive angle:
Principal coterminal angle is (7π)/4

 

To find negative coterminal angles, I must do
given angle - 2pi.

Yes?

Yo find positive coterminal angles, I must do
given angle + 2pi.

Yes?

 

yes
if given angle -2 π, then
-2 π = -360°
Coterminal angle in [0, 2π) range: 0 π, located in the positive x-axis.
Positive coterminal angles:
2π, 4π,
6π, 8π,
Negative coterminal angles:
-0π, -2π,
-4π, -6π,