The Unit Circle Answers
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21
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Explain how to find the exact value of sin(570°).
Answer:
Find that the terminal side lands in quadrant III. The angle is coterminal with a 210° angle. The reference angle is 30°. The sine of 30° is 1/2. Sine is negative in quadrant III. The sine of 570° is –1/2.
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Which did you include in your response?
A
Find that the terminal side lands in quadrant III.B
The angle is coterminal with a 210° angle.C
The reference angle is 30°.D
The sine of 30° is 1/2.E
Sine is negative in quadrant III.F
The sine of 570° is –1/2.24
The angles that share the same sine value as sin(45°) have terminal sides in quadrant ✔ IIIIIIV(none of the quadrants).
A
✔ IIB
IIIC
IVD
(none of the quadrants)25
degrees.
Answer not available
26
degrees.
Answer not available
27
The angles that share the same tangent value as tan(45°) have terminal sides in quadrant II✔ IIIIV(none of the quadrants).
A
IIB
✔ IIIC
IVD
(none of the quadrants)28
degrees.
Answer:
60
29
degrees.
Answer not available
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