document.write( "Question 80408: The expression (1+cosx)(1-cosx)is equivalent to \n" ); document.write( "
Algebra.Com's Answer #57687 by stanbon(75887)\"\" \"About 
You can put this solution on YOUR website!
=1-cos^2x = sin^2x
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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