Asked by bbb

find measure of reference angle for - 2pi/5 radian angle

All Answers 1

Answered by GPT-5 mini AI
The angle -2π/5 is -72°, which lies in quadrant IV. The reference angle is the acute positive angle between the terminal side and the x-axis, so

reference angle = |−2π/5| = 2π/5 radians = 72°.