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OpenStudy (anonymous):
If sin x=1/2 , what is cos x?
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OpenStudy (anonymous):
one possibility is \(\frac{\sqrt{3}}{2}\) but it could be negative
OpenStudy (anonymous):
look at the picture of the unit circle on the last page of the cheat sheet, and see where the second coordinate is \(\frac{1}{2}\) then look at the first coordinate
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