document.write( "Question 615270: verify the identity tanx(1-sinx^2x)=1/2sin2x \n" ); document.write( "
Algebra.Com's Answer #387120 by lwsshak3(11628)\"\" \"About 
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verify the identity
\n" ); document.write( "tanx(1-sinx^2x)=1/2sin2x
\n" ); document.write( "**
\n" ); document.write( "Start with left side
\n" ); document.write( "tanx(1-sinx^2x)
\n" ); document.write( "=(sinx/cosx)(cos^2x)
\n" ); document.write( "=sinxcosx
\n" ); document.write( "=(1/2)sin2x
\n" ); document.write( "verified:
\n" ); document.write( "left side=right side
\n" ); document.write( " \n" ); document.write( "
\n" );