Grade 12 Math: Reference Angles
This worksheet focuses on understanding and calculating reference angles for various trigonometric functions in Grade 12 mathematics.
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Standards
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Grade 12 Math: Reference Angles
Name:
Date:
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Read each question carefully and provide the best answer. Show all your work for full credit.
1. Define what a reference angle is in your own words, and explain its significance in trigonometry.
2. What is the reference angle for 240°?
30°
60°
90°
120°
3. Determine the reference angle for an angle of 315°.
30°
45°
60°
90°
4. An angle of 150° lies in Quadrant and has a reference angle of .
5. An angle of -120° is coterminal with °, lies in Quadrant , and has a reference angle of .
6. An angle θ has a reference angle of 30°. If the terminal side of θ is in Quadrant III, what is the measure of θ?
7. Draw an angle of 480° on the coordinate plane and label its reference angle. (You do not need to use a protractor, a sketch is fine).
8. The reference angle for an angle of 7π/4 radians is π/4 radians.
True
False
9. A reference angle can be negative.
True
False
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