document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1128175>Question 1128175</A>: <I><SPAN STYLE=\"word-break: break-all;\"> prove (1/1+cosx)+(1/1-cosx)=2csc^2 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #744660 by </B><A HREF=/tutors/aboutme.mpl?userid=MathLover1><B>MathLover1(20850)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=MathLover1><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=MathLover1><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=744660\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\">  \r<BR>\n" );
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document.write( "prove <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=1%2F%281%2Bcos%28x%29%29%2B1%2F%281-cos%28x%29%29=2csc%28x%29%5E2+ ALIGN=MIDDLE  ALT=\"1%2F%281%2Bcos%28x%29%29%2B1%2F%281-cos%28x%29%29=2csc%28x%29%5E2+\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "start with left side\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%281-cos%28x%29%29%2F%28%281-cos%28x%29%29%281%2Bcos%28x%29%29%29%2B%281%2Bcos%28x%29%29%2F%28%281%2Bcos%28x%29%29%281-cos%28x%29%29%29 ALIGN=MIDDLE   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=%281-cos%28x%29%2B1%2Bcos%28x%29%29%2F%28%281%2Bcos%28x%29%29%281-cos%28x%29%29%29 ALIGN=MIDDLE  ALT=\"%281-cos%28x%29%2B1%2Bcos%28x%29%29%2F%28%281%2Bcos%28x%29%29%281-cos%28x%29%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=2%2F%28%281%2Bcos%28x%29%29%281-cos%28x%29%29%29 ALIGN=MIDDLE  ALT=\"2%2F%28%281%2Bcos%28x%29%29%281-cos%28x%29%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=2%2F%281-cos%28x%29%5E2%29 ALIGN=MIDDLE  ALT=\"2%2F%281-cos%28x%29%5E2%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=2%2F%281-%281-sin%28x%29%5E2%29%29 ALIGN=MIDDLE  ALT=\"2%2F%281-%281-sin%28x%29%5E2%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=2%2F%281-1%2Bsin%28x%29%5E2%29%29 ALIGN=MIDDLE  ALT=\"2%2F%281-1%2Bsin%28x%29%5E2%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=2%2F%28sin%28x%29%5E2%29%29 ALIGN=MIDDLE  ALT=\"2%2F%28sin%28x%29%5E2%29%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >..........use identity <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=sin%28x%29%5E2=1%2Fcsc%5E2%28x%29 ALIGN=MIDDLE  ALT=\"sin%28x%29%5E2=1%2Fcsc%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=2%2F%281%2Fcsc%5E2%28x%29%29 ALIGN=MIDDLE  ALT=\"2%2F%281%2Fcsc%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=2csc%5E2%28x%29 ALIGN=MIDDLE  ALT=\"2csc%5E2%28x%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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