document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=982592>Question 982592</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Prove the identity:\r<BR>\n" );
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document.write( "cot(^2)x-1 / cot(^2)x+1 = cos2x </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #603439 by </B><A HREF=/tutors/aboutme.mpl?userid=mananth><B>mananth(16946)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=mananth><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/cgi-bin/show-face.mpl?user=mananth><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=603439\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> cot(^2)x-1 / cot(^2)x+1 = cos2x\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28cot%5E2%28x%29-1%29%2F%28cot%5E2%28x%29%2B1%29 ALIGN=MIDDLE  ALT=\"%28cot%5E2%28x%29-1%29%2F%28cot%5E2%28x%29%2B1%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=cot%5E2%28x%29%2B1=coec%5E2%28x%29 ALIGN=MIDDLE  ALT=\"cot%5E2%28x%29%2B1=coec%5E2%28x%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28cot%5E2%28x%29-1%29%2F%28cosec%5E2%28x%29%29 ALIGN=MIDDLE  ALT=\"%28cot%5E2%28x%29-1%29%2F%28cosec%5E2%28x%29%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28cot%5E2%28x%29%2Fcosec%5E2%28x%29%29-%281%2Fcosc%5E2%28x%29%29 ALIGN=MIDDLE  ALT=\"%28cot%5E2%28x%29%2Fcosec%5E2%28x%29%29-%281%2Fcosc%5E2%28x%29%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=cos%5E2%28x%29-sin%5E2%28x%29 ALIGN=MIDDLE  ALT=\"cos%5E2%28x%29-sin%5E2%28x%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "cos(2x)\r<BR>\n" );
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