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Problem : What is the measure of the reference angle for a 310-degree angle?

50 degrees

Problem : Which angle is complementary to its reference angle?

A 45 degree angle ( radians)

Problem : Which value is not equal to the others: sin(), sin(), sin(), sin()?

sin() is unequal to the others because it is negative, and the other three are positive.

Problem : Which angles are equal to their reference angles?

Any first quadrant angle, the 0 degree angle, and the 90 degree angle.

Problem : What is the measure of the reference angle for an angle of radians?

radians
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