document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1189411>Question 1189411</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Prove : tanx + tanxcos2x=sin2x </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #820777 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=820777\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> \r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=tan%28x%29+%2B+tan%28x%29cos%282x%29=sin%282x%29 ALIGN=MIDDLE  ALT=\"tan%28x%29+%2B+tan%28x%29cos%282x%29=sin%282x%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "manipulate left side\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=tan%28x%29%281+%2B+cos%282x%29%29+ ALIGN=MIDDLE  ALT=\"tan%28x%29%281+%2B+cos%282x%29%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" >...........use Double-Angle Identities <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=cos%282x%29=2cos+%5E2%28x%29-1 ALIGN=MIDDLE  ALT=\"cos%282x%29=2cos+%5E2%28x%29-1\"   DISABLED_style= \"max-width:90%; height:auto;\" > and identity <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=tan%28x%29=sin%28x%29%2Fcos%28x%29 ALIGN=MIDDLE  ALT=\"tan%28x%29=sin%28x%29%2Fcos%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=%28sin%28x%29%2Fcos%28x%29%29%281%2B2cos+%5E2%28x%29-1%29+ ALIGN=MIDDLE  ALT=\"%28sin%28x%29%2Fcos%28x%29%29%281%2B2cos+%5E2%28x%29-1%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=%28sin%28x%29%2Fcos%28x%29%29%282cos+%5E2%28x%29%29+ ALIGN=MIDDLE  ALT=\"%28sin%28x%29%2Fcos%28x%29%29%282cos+%5E2%28x%29%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" >..........simplify\r<BR>\n" );
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document.write( "=<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2sin%28x%29cos+%28x%29 ALIGN=MIDDLE  ALT=\"2sin%28x%29cos+%28x%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >....................use Double-Angle Identities <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=sin%282x%29=+2sin%28x%29cos+%28x%29 ALIGN=MIDDLE  ALT=\"sin%282x%29=+2sin%28x%29cos+%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=sin%282x%29 ALIGN=MIDDLE  ALT=\"sin%282x%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >-> proven\r<BR>\n" );
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document.write( " </SPAN>\n" );
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