Question

Prove that
sin 2A.cosA+cos2S.sinA=sin4A.cosA-cos4A.sinA

Please not give the answer as I don't know and others..​

Answer 1

Step-by-step explanation:

SOLUTION:-

To prove:

sin2A. cosA+cos 2A. sinA=sin4A .cosA-cos4A.sinA

Prove:

L.H.S:sin 2A.cosA+cos2A.sinA

=sin(2A+A)

=sin3A

R.H.S:sin4A. cosA- cos4A.sinA

=sin(4A-A)

=sin3A

so,L.H.S=R.H.S(Proved)

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