document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=731805>Question 731805</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I need to find the exact value of tan40°-tan10°/1+tan40°tan10°\r<BR>\n" );
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document.write( "The problem obviously has something to do with sum & difference identities but I have no idea what to do with it. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #447303 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=447303\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> I need to find the exact value of tan40°-tan10°/1+tan40°tan10° <BR>\n" );
document.write( "Identity: tan(s-t)=(tan s-tan t)/(1+tan s*tan t)<BR>\n" );
document.write( "tan40°-tan10°/1+tan40°tan10°=tan(40º-10º)=tan30º=&#8730;3/3 </SPAN>\n" );
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