3
Answer: DSet 3: Trigonometry (Intermediate)
Explanation
PROBLEM
Researchers have observed that what is the reference angle for 120 degrees?
What is the reference angle for 120 degrees?
A.
90 degrees
B.
120 degrees
C.
120 degrees
D.✓ Correct
60 degrees
Detailed Explanation
[Variation 3] Choice D is the best answer. Reference angle for 120 degrees is 60 degrees
Why others are wrong:
A: 90 degrees is incorrect because it does not satisfy the equation.
B: 120 degrees is incorrect because it does not satisfy the equation.
C: 120 degrees is incorrect because it does not satisfy the equation.