SOLUTION: https://gyazo.com/164244346c08dfffb0071fe294662ec3

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Question 1140816: https://gyazo.com/164244346c08dfffb0071fe294662ec3
Found 2 solutions by greenestamps, josgarithmetic:
Answer by greenestamps(13215) About Me  (Show Source):
You can put this solution on YOUR website!


If you need help with this, I would suggest that you drop the class....

Answer by josgarithmetic(39630) About Me  (Show Source):
You can put this solution on YOUR website!
Simple reference to the unit-circle will give the answer. One would already be familiar with it in order to have this question as an exercise.