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2 years ago

12

What reference angle in the first quadrant corresponds to theta = -120? Answer in radians.

2 answers:

creativ13 [48]2 years ago

4 0

To draw theta=-120° in the unit circle, we move clockwise 90°, then another 30°.

This means that we pass the fourth quadrant and stop in the third quadrant.

The reference angle of an angle theta in the third quadrant, is theta + 180°.

So the reference angle of -120° is -120°+180°=60°.

360° are 2π Radians
then 60° are 1/6 of 2π Radians = π/3 Radians

Answer: Reference angle is π/3 Radians

Eduardwww [97]2 years ago

3 0

Answer:

Answer: Reference angle is π/3 Radians

Step-by-step explanation:

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