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OpenStudy (anonymous):
Suppose sin A = 12/13 with 90º≤A≤180º. Suppose also that sin B = 7/25 with -90º≤B≤0º. Find tan (A - B).
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OpenStudy (anonymous):
find COS A = 1- SIN^2 (A), similarly COS B then use tan(a-b)= TAN A - TAN B / (1+TAN A * TAN B)
OpenStudy (anonymous):
okay thanks
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