Question

For the rotation - 390°, find the coterminal angle from0º < 0 < 360°, the quadrant and the reference angle.The coterminal angle isl', which lies in Quadrantwitha reference angle of

Answer 1

We have -390°

between 0°<0<360°

we need to add 360° until we have a positive number

-390+360=-30

-30+360=330

Coterminal angle in [0, 360°) range is 330°, located in the fourth quadrant.

then for the reference angle

360-330= 30

the reference angle is 30°

The coterminal angle is 330°, which lies in Quadrant fourth, with a reference angle of