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OpenStudy (anonymous):
Find cos(2theta) given that tan(theta)=1/2, pi
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OpenStudy (solomonzelman):
\[\color{blue}{ \tanθ= \frac{1}{2} , } ~~~~~~~~~\color{blue}{ 180<θ<270 } \]
OpenStudy (solomonzelman):
you tell me, what quadrant this will be in ?
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