SOLUTION: How do you find the exact circular value of sin 9pi/4

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Question 962967: How do you find the exact circular value of sin 9pi/4
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
+sin%28+9%2A%28pi%2F4%29+%29+
Note that +8%2A%28+pi%2F4+%29+=+2%2Api+
That would be a 360 degree
rotation around the unit circle
which puts you back at zero degrees
---------------------------------
Now you turn +pi%2F4+ more in the positive
direction. You are in the 1st quadrant
+sin%28+pi%2F4+%29+=+sqrt%282%29+%2F+2+