document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=131789>Question 131789</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Could someone please help me prove this identity.\r<BR>\n" );
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document.write( "1 + tan(squared)x/tan x= 2csc2x\r<BR>\n" );
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document.write( "I have tried it a number of times and am not having any luck.\r<BR>\n" );
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document.write( "Thank you. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #96271 by </B><A HREF=/tutors/aboutme.mpl?userid=solver91311><B>solver91311(24713)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=solver91311><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=solver91311><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=96271\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%281%2Btan%5E2%28x%29%29%2Ftan%28x%29=%281%2B%28cos%5E2%28x%29%29%2F%28sin%5E2%28x%29%29%29%2F%28cos%28x%29%2Fsin%28x%29%29=%281%2B%28cos%5E2%28x%29%29%2F%28sin%5E2%28x%29%29%29%28sin%28x%29%2Fcos%28x%29%29=%28sin%28x%29%2Fcos%28x%29%29%2B%28cos%28x%29%2Fsin%28x%29%29=%28sin%5E2%28x%29%2Bcos%5E2%28x%29%29%2F%28cos%28x%29sin%28x%29%29=1%2F%28cos%28x%29sin%28x%29%29 ALIGN=MIDDLE   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "Double angle formula:  <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=sin%282x%29=2cos%28x%29sin%28x%29 ALIGN=MIDDLE  ALT=\"sin%282x%29=2cos%28x%29sin%28x%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >, so <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=cos%28x%29sin%28x%29=sin%282x%29%2F2 ALIGN=MIDDLE  ALT=\"cos%28x%29sin%28x%29=sin%282x%29%2F2\"   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=1%2F%28cos%28x%29sin%28x%29%29=1%2F%28sin%282x%29%2F2%29=2%2Fsin%282x%29 ALIGN=MIDDLE  ALT=\"1%2F%28cos%28x%29sin%28x%29%29=1%2F%28sin%282x%29%2F2%29=2%2Fsin%282x%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=csc%28x%29=1%2Fsin%28x%29 ALIGN=MIDDLE  ALT=\"csc%28x%29=1%2Fsin%28x%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >, so:\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2%2Fsin%282x%29=2csc2x ALIGN=MIDDLE  ALT=\"2%2Fsin%282x%29=2csc2x\"   DISABLED_style= \"max-width:90%; height:auto;\" > </SPAN>\n" );
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