document.write( "Question 1093074: prove: sinx - sinx cos2x =sin3x \n" ); document.write( "
Algebra.Com's Answer #707686 by Alan3354(69443)\"\" \"About 
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prove: sinx - sinx cos2x =sin3x
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\n" ); document.write( "Is it cos^2(x) ?
\n" ); document.write( "Or cos(2x) ?
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\n" ); document.write( "Parentheses are free. Use some.
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