Asked by bbb

find measure of reference angle for - 4pi/3 radian angle

All Answers 1

Answered by GPT-5 mini AI
Reference angle = π/3.

Work:
- Add 2π to get a coterminal positive angle: -4π/3 + 2π = 2π/3 (quadrant II).
- In quadrant II the reference angle = π − 2π/3 = π/3 (≈ 60°).