document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=984483>Question 984483</A>: <I><SPAN STYLE=\"word-break: break-all;\"> evaluate tan 13pi/12 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #605265 by </B><A HREF=/tutors/aboutme.mpl?userid=srinivas.g><B>srinivas.g(540)</B></A><img src=\"/images/stars/stars-10.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=srinivas.g><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=srinivas.g><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=605265\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> pi = 180 degrees<BR>\n" );
document.write( "  <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=13%2Api%2F12+=+13%2A180%2F12+ ALIGN=MIDDLE  ALT=\"13%2Api%2F12+=+13%2A180%2F12+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "    =<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+195 ALIGN=MIDDLE  ALT=\"+195\"   DISABLED_style= \"max-width:90%; height:auto;\" > degrees<BR>\n" );
document.write( " hence  tan (13pi/12)=  tan(195)<BR>\n" );
document.write( "   tan(195)= tan (180+15)<BR>\n" );
document.write( "            = tan(15)<BR>\n" );
document.write( "           tan(15) = tan(60-45) <BR>\n" );
document.write( "= <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28tan%2860%29-tan%2845%29%29%2F%281%2Btan%2860%29%2Atan%2845%29%29 ALIGN=MIDDLE  ALT=\"%28tan%2860%29-tan%2845%29%29%2F%281%2Btan%2860%29%2Atan%2845%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=%28sqrt%283%29-1%29%2F%281%2Bsqrt%283%29%2A1%29 ALIGN=MIDDLE  ALT=\"%28sqrt%283%29-1%29%2F%281%2Bsqrt%283%29%2A1%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Multiply numerator and denominator by <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=1-sqrt%283%29 ALIGN=MIDDLE  ALT=\"1-sqrt%283%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > to get:\r<BR>\n" );
document.write( "\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%281-sqrt%283%29%29%5E2%2F%281-3%29 ALIGN=MIDDLE  ALT=\"%281-sqrt%283%29%29%5E2%2F%281-3%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "= <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%281-2sqrt%283%29%2B3%29%2F2 ALIGN=MIDDLE  ALT=\"%281-2sqrt%283%29%2B3%29%2F2\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "= <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%284-2sqrt%283%29%29%2F2 ALIGN=MIDDLE  ALT=\"%284-2sqrt%283%29%29%2F2\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "= <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2-sqrt%283%29 ALIGN=MIDDLE  ALT=\"2-sqrt%283%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Result : <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2-sqrt%283%29 ALIGN=MIDDLE  ALT=\"2-sqrt%283%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );