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OpenStudy (anonymous):
In the 3rd quadrant , if sin A = -3/5 and sec B = -13/12 then tan (A-B) = ?
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OpenStudy (anonymous):
sinA=-3/5 secB=-13/12(I think you know that secB is the same as 1/cosB) I'll draw the triangles for you..
OpenStudy (anonymous):
|dw:1380812016932:dw|
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