document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=871054>Question 871054</A>: <I><SPAN STYLE=\"word-break: break-all;\"> tan (-5pi/12)<BR>\n" );
document.write( "Use an Addition or Subtraction Formula to find the exact value of the expression </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #525287 by </B><A HREF=/tutors/aboutme.mpl?userid=lwsshak3><B>lwsshak3(11628)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=lwsshak3><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/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=525287\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> tan (-5pi/12)<BR>\n" );
document.write( "Use an Addition or Subtraction Formula to find the exact value of the expression.<BR>\n" );
document.write( "***<BR>\n" );
document.write( "tan(-5&#960;/12)=tan(4&#960;/12-9&#960;/12)=tan(&#960;/3-3&#960;/4)<BR>\n" );
document.write( "Identity: tan(s-t)=(tan s-tan t)/(1+tan s*tan t<BR>\n" );
document.write( "tan(&#960;/3-3&#960;/4)=tan(&#960;/3-tan(3&#960;/4))/(1+tan(&#960;/3*tan(3&#960;/4)<BR>\n" );
document.write( "=(&#8730;3+1))/(1+(&#8730;3*-1)<BR>\n" );
document.write( "=(&#8730;3+1))/(1-&#8730;3)<BR>\n" );
document.write( "=(&#8730;3+1))/(1-&#8730;3)<BR>\n" );
document.write( "Calculator check:<BR>\n" );
document.write( "tan(-5&#960;/12)&#8776;-3.732…<BR>\n" );
document.write( "Exact value=(&#8730;3+1))/(1-&#8730;3)&#8776;-3.732…          </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );