sin(A+B)cos(A-B)+sin(A-B)cos(A+B)
=
give complete explanation
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Answered by
3
we know that sin(A+B) = sinA cosB+ cosA sinB
by the same formula here we get sin ( A+B+A-B)
= sin 2A
by the same formula here we get sin ( A+B+A-B)
= sin 2A
Answered by
3
Given expression is of form sin(X+Y)=sinXcosY+cosXsinY
over here X=A+B Y=A-B
So,given expression changes to sin(A+B+A-B)
=sin2A.
over here X=A+B Y=A-B
So,given expression changes to sin(A+B+A-B)
=sin2A.
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