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Mathematics 13 Online
OpenStudy (anonymous):

How can I evaluate this without a calculator? sin(theta), if cos(theta)=2/3 and tan(theta)<0

OpenStudy (isaiah.feynman):

The only place were cosine is positive and at the same time tangent is negative is in the fourth quadrant.

OpenStudy (anonymous):

Right, okay

OpenStudy (isaiah.feynman):

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