document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=131980>Question 131980</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I am having a very hard time proving this identity\r<BR>\n" );
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document.write( "sin 2x + sin 4x/cos 2x - cos 4x = cot x.  \r<BR>\n" );
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document.write( "If someone could help me that would be great.  Also if you could break it down for me and explain what you did I would be very grateful.  I have tried doing it several ways and can not figure it out.\r<BR>\n" );
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document.write( "Thanks so much.  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #96370 by </B><A HREF=/tutors/aboutme.mpl?userid=TakeATuition.com><B>TakeATuition.com(57)</B></A><img src=\"/images/stars/stars-08.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=TakeATuition.com><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.takeatuition.com/images/logo.jpg valign=middle><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=96370\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> SOLUTION -<BR>\n" );
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document.write( " <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28Sin2x%2Bsin4x%29%2F%28cos2x-cos4x%29 ALIGN=MIDDLE  ALT=\"%28Sin2x%2Bsin4x%29%2F%28cos2x-cos4x%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >=cotx<BR>\n" );
document.write( " Taking L.H.S we have<BR>\n" );
document.write( " [<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2sin%28%282x%2B4x%29%2F2%29 ALIGN=MIDDLE  ALT=\"2sin%28%282x%2B4x%29%2F2%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=cos%28%282x-4x%29%2F2%29 ALIGN=MIDDLE  ALT=\"cos%28%282x-4x%29%2F2%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >]/[<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-2sin%28%282x%2B4x%29%2F2%29 ALIGN=MIDDLE  ALT=\"-2sin%28%282x%2B4x%29%2F2%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=sin%28%282x-4x%29%2F2%29 ALIGN=MIDDLE  ALT=\"sin%28%282x-4x%29%2F2%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >]    <BR>\n" );
document.write( "   { (since <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=sinc%2Bsind ALIGN=MIDDLE  ALT=\"sinc%2Bsind\"   DISABLED_style= \"max-width:90%; height:auto;\" >=2<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=sin%28%28c%2Bd%29%2F2%29 ALIGN=MIDDLE  ALT=\"sin%28%28c%2Bd%29%2F2%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=cos%28%28c-d%29%2F2%29 ALIGN=MIDDLE  ALT=\"cos%28%28c-d%29%2F2%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "           <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=cosc-cosd ALIGN=MIDDLE  ALT=\"cosc-cosd\"   DISABLED_style= \"max-width:90%; height:auto;\" >=-2<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=sin%28%28c%2Bd%29%2F2%29 ALIGN=MIDDLE  ALT=\"sin%28%28c%2Bd%29%2F2%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=sin%28%28c-d%29%2F2%29 ALIGN=MIDDLE  ALT=\"sin%28%28c-d%29%2F2%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >}<BR>\n" );
document.write( " =<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%282sin3xcos%28-x%29%29 ALIGN=MIDDLE  ALT=\"%282sin3xcos%28-x%29%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >/<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28-2sin3xsin%28-x%29%29 ALIGN=MIDDLE  ALT=\"%28-2sin3xsin%28-x%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=cosx%2Fsinx ALIGN=MIDDLE  ALT=\"cosx%2Fsinx\"   DISABLED_style= \"max-width:90%; height:auto;\" >    {since cos(-x)=cosx and sin(-x)=-sinx}<BR>\n" );
document.write( " = cotx<BR>\n" );
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document.write( "FOR MORE HELP VISIT :www.TakeATuition.com\r<BR>\n" );
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document.write( "  </SPAN>\n" );
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