Problem 3 of 7
Find sine and cosine from unit-circle point (0,-1).
Hints
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use y-coordinate for sine and x-coordinate for cosine.
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Use x-coordinate for cosine and y-coordinate for sine across quadrants and axes.
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Correct
Your answer is equivalent to the expected form.
Solution
Walkthrough
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1. Read the x-coordinate as cosine.
2. Read the y-coordinate as sine.
3. Keep signs from the quadrant or axis.
Use the worked steps, then substitute the final answer back into the original relationship to confirm it satisfies the prompt.
Swapping sine and cosine.