Set 3: Trigonometry (Advanced)

[Variation 1] **Choice A is the best answer.** Reference angle for 120 degrees is 60 degrees

Explanation

Answer: A

PROBLEM

Recent studies show that what is the reference angle for 120 degrees?

What is the reference angle for 120 degrees?

60 degrees

✓ Correct

120 degrees

90 degrees

Detailed Explanation

[Variation 1] Choice A is the best answer. Reference angle for 120 degrees is 60 degrees

Why others are wrong:

B: 120 degrees is incorrect because it does not satisfy the equation.

C: 120 degrees is incorrect because it does not satisfy the equation.

D: 90 degrees is incorrect because it does not satisfy the equation.