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OpenStudy (anonymous):
If sin(A)=0.5 and angle A is a second quadrant right angle, what is cos(A)?
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OpenStudy (aravindg):
|dw:1395028636332:dw| Find X.
OpenStudy (anonymous):
Square root of 3
OpenStudy (aravindg):
Now can you find cos A?
OpenStudy (anonymous):
x = -sqrt(3), since A is in second quadrant
OpenStudy (anonymous):
Ok
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