Question
Sat March 07, 2015 By: Harees Ahmed

Sir, PLease proove me the identity, Question no 89069, Mathematics
Sir, PLease proove me the identity.

Expert Reply
Mili Hariyani
Sat March 07, 2015

begin mathsize 12px style H e r e comma L. H. S. space equals space tan squared A space minus space tan squared B equals fraction numerator sin squared A over denominator cos squared A end fraction minus fraction numerator sin squared B over denominator cos squared B end fraction space equals fraction numerator s i n squared A cos squared B space minus space sin squared B cos squared A space over denominator c o s squared A cos squared B end fraction equals fraction numerator s i n squared A left parenthesis 1 space minus space sin squared B right parenthesis space minus space sin squared B left parenthesis 1 minus sin squared A right parenthesis space over denominator c o s squared A cos squared B end fraction equals fraction numerator s i n squared A space minus up diagonal strike space sin squared A. sin squared B end strike space minus space sin squared B plus up diagonal strike sin squared A. sin squared B end strike space over denominator c o s squared A cos squared B end fraction equals fraction numerator s i n squared A space minus sin squared B space over denominator c o s squared A. cos squared B end fraction equals space R. H. S. end style

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