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OpenStudy (anonymous):
Find cos θ if sin θ =-12/13 and tan θ > 0.
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OpenStudy (anonymous):
help!!!! please!
geerky42 (geerky42):
From the given information, we know that θ is in quadrant III. Draw a triangle, shall we?|dw:1362626803639:dw| We need to find x. Use Pythagorean Theorem to find x. Remember, the value of x should be negative since angle is in quadrant III.
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