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

a

The quadrant that Θ is located in.

 b

  The quadrant that \large 2\theta would be located in

 c

It doesn't matter

 d

The quadrant \large \frac{\theta}{2}

is located in
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1 Answer

d) the quadrant where theta/2 is located
by Level 8 User (30.1k points)

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