document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1058611>Question 1058611</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Please help me with the following question.\r<BR>\n" );
document.write( "\n" );
document.write( "Prove this identity:\r<BR>\n" );
document.write( "\n" );
document.write( "(1-cos^2x)(1+cos^2x) = 2sin^2x - sin^4x </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #673703 by </B><A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><B>josgarithmetic(39620)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=673703\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> (1-cos^2x)(1+cos^2x) = 2sin^2x - sin^4x\r<BR>\n" );
document.write( "\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%281-cos%5E2x%29%281%2Bcos%5E2x%29+=+2sin%5E2x+-+sin%5E4x ALIGN=MIDDLE  ALT=\"%281-cos%5E2x%29%281%2Bcos%5E2x%29+=+2sin%5E2x+-+sin%5E4x\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
document.write( "\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%281-cos%5E2%28x%29%29%281%2Bcos%5E2%28x%29%29+=+2sin%5E2%28x%29+-+sin%5E4%28x%29 ALIGN=MIDDLE  ALT=\"%281-cos%5E2%28x%29%29%281%2Bcos%5E2%28x%29%29+=+2sin%5E2%28x%29+-+sin%5E4%28x%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "RHS,<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=sin%5E2%28x%29%282-sin%5E2%28x%29%29 ALIGN=MIDDLE  ALT=\"sin%5E2%28x%29%282-sin%5E2%28x%29%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%281-cos%5E2%28x%29%29%282-sin%5E2%28x%29%29 ALIGN=MIDDLE  ALT=\"%281-cos%5E2%28x%29%29%282-sin%5E2%28x%29%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%281-cos%5E2%28x%29%29%282-%281-cos%5E2%28x%29%29%29 ALIGN=MIDDLE  ALT=\"%281-cos%5E2%28x%29%29%282-%281-cos%5E2%28x%29%29%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%281-cos%5E2%28x%29%29%282-1%2Bcos%5E2%28x%29%29 ALIGN=MIDDLE  ALT=\"%281-cos%5E2%28x%29%29%282-1%2Bcos%5E2%28x%29%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%281-cos%5E2%28x%29%29%281%2Bcos%5E2%28x%29%29 ALIGN=MIDDLE  ALT=\"%281-cos%5E2%28x%29%29%281%2Bcos%5E2%28x%29%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >------------Identical to LHS </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );