Posted by sumayya on Monday, June 29, 2009 at 2:26pm.
multiply the left side by sinAcosA/(sinAcosA) sin^2A*(cosA+sinA)+cos^2A*(sin+cosA)/ ( ) (cosA+sinA)(sin^2+ cos^2)/ ( ) 1/sinA + 1/Cos A cscA + secA qed