Question

Half angle problem

Answer 1

Sin(7pi/8)

Answer 2

Is this value they gave me theta or half of theta

Answer 3

Or is it sin(theta) and I need to plug theta into the problem

Answer 4

Unless you know radians very well, I would change to degrees. It becomes more obvious.
7pi/8 is 315/2 = 157.5 degrees. that is in the second quadrant, and corresponds to 22.5 degrees, which is 1/2 of 45 degrees

Answer 5

So theta is 315?

Answer 6

And 7pi/8 * 180/pi is 157.5

Answer 7

yes