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Question: Find the exact coordinates of the point at which the terminal side of the angle intersects the unit circle.



A ) (- 12, - 32)
B ) (12, - 32)
C ) (12, 32)
D ) (- 12, 32)

Steps to derive



2 x-coordinate = cos (- 120°) = - 12
 [x-coordinate is negative in quadrant III.]

3 y-coordinate = sin (- 120°) = - 32
 [y-coordinate is negative in quadrant III.]

4 The coordinates of point P are (- 12, - 32).



Hence the right answer is Option A

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