Answer to Question #144042 in Trigonometry for Shahir Sheikh

Question #144042

What determines whether cos(theta/2) is positive or negative?

A. The quadrant that theta is located in.
B. The quadrant that theta/2 is located in.
C. The quadrant that 2theta would be located in.
D. It doesn't matter

Expert's answer

B. The quadrant that theta/2 is located in.

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