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1

Set 1: Trigonometry (Intermediate)

Explanation

Answer: D

PROBLEM

Recent studies show that what is the reference angle for 210 degrees?

What is the reference angle for 210 degrees?

A.

60 degrees

B.

150 degrees

C.

210 degrees

D.

30 degrees

✓ Correct

Detailed Explanation

[Variation 1] Choice D is the best answer. Reference angle for 210 degrees is 30 degrees

Why others are wrong:
A: 60 degrees is incorrect because it does not satisfy the equation.
B: 150 degrees is incorrect because it does not satisfy the equation.
C: 210 degrees is incorrect because it does not satisfy the equation.
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