Question: Using - sinmxdx = 0 and - cosnxdx = 0 , where m , n in Z . Prove the following identity: 0 sinnxsinmxdx =

Using -sinmxdx=0and -cosnxdx=0,where m,n in Z.
Prove the following identity: 0sinnxsinmxdx={/2ifn=m0ifnm.

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