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OpenStudy (anonymous):
Find the exact value of the expression. tan(sin^-1(5/6) - cos^-1(1/5))
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OpenStudy (anonymous):
tan(A+B)=(tanA+tanB)/(1-tanAtanB)
OpenStudy (anonymous):
the other one... tan(A-B)=(tanA-tanB)/(1+tanAtanB)
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