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OpenStudy (anonymous):
What is the exact value of tan(2θ) if cosθ=−8/17 and θ is in quadrant III?
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OpenStudy (anonymous):
@thomaster please help?
OpenStudy (mertsj):
\[\tan(2\theta)=\frac{2\tan \theta}{1-\tan ^2\theta}\]
OpenStudy (mertsj):
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