Answer:
A. √3/2
Explanation:
You want to know sin(θ) if the terminal point of angle θ on the unit circle is (1/2, √3/2).
Unit circle
The coordinates on the unit circle of the terminal point of angle θ are ...
(x, y) = (cos(θ), sin(θ))
Comparing this to the given terminal point, we find ...
cos(θ) = 1/2
sin(θ) = √3/2
The sine of angle θ is √3/2, choice A.
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