sin^2 A. cos 2B - sin^2 B. cos 2A = cos^2 B - Cos^2 A
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Answered by
1
Answer:
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Answered by
10
Step-by-step explanation:
LHS=(sinAcosB) 2 −(cosAsinB) 2
=(sinAcosB+cosAsinB)(sinAcosB−cosAsinB)
=sin(A+B)sin(A−B)
=sin 2A−sin 2 B
=RHS
Hence proved
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