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Mathematics 17 Online
OpenStudy (anonymous):

If A+B+C=π prove:- tan A + tan B + tan C= tan A.tan B.tan C

OpenStudy (anonymous):

A+B=π-C now just apply tangent function tan (A+B)=tan (π-C)

OpenStudy (anonymous):

Then equate the 2 sides using double angle formula for Tan

OpenStudy (anonymous):

OpenStudy (anonymous):

thanks a lot..............

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