Home Opt. Mathematics Prove that: (sin3Acos2A-cos3ASin2A)/(cos3Acos2A+sin3Asin2A) = TanA

Saturday, January 6, 2018

Prove that: (sin3Acos2A-cos3ASin2A)/(cos3Acos2A+sin3Asin2A) = TanA

L.H.S
=(sin3Acos2A-cos3ASin2A)/(cos3Acos2A+sin3Asin2A)
=(sin(3A-2A))/(cos(3A-2A)
=sinA/cosA
=tanA
Prove that: (sin3Acos2A-cos3ASin2A)/(cos3Acos2A+sin3Asin2A) = TanA Prove that: (sin3Acos2A-cos3ASin2A)/(cos3Acos2A+sin3Asin2A) = TanA S.E.E. Solution 5.0 stars based on 35 reviews L.H.S =(sin3Acos2A-cos3ASin2A)/(cos3Acos2A+sin3Asin2A) =(sin(3A-2A))/(cos(3A-2A) =sinA/cosA =tanA
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