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OpenStudy (anonymous):
What are the sine, cosine, and tangent of 7 pi over 4 radians?
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OpenStudy (anonymous):
very confused
OpenStudy (luigi0210):
Well something with pi/4 is 45 degrees. And 7pi/4 is in the 4 quad meaning only cos is positive. So use the 45-45-90 triangle.
OpenStudy (anonymous):
ok
OpenStudy (anonymous):
not very good in math so still kind of confused with this problem
OpenStudy (anonymous):
anyone there
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OpenStudy (anonymous):
use the unit circle. find where 7pi/4 radians is. then draw a 454590 do you know the unit circle?
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