document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=882094>Question 882094</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Prove the following identity:   cos(x-y)/cosxcosy=1+tanxtany </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #532689 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=532689\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Prove the following identity: cos(x-y)/cosxcosy=1+tanxtany<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=cos%28x-y%29=%28cosx%2Acosy%2Bsinxsiny%29%2F%28cosxcosy%29 ALIGN=MIDDLE  ALT=\"cos%28x-y%29=%28cosx%2Acosy%2Bsinxsiny%29%2F%28cosxcosy%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=cos%28x-y%29=%281%2B%28sinxsiny%29%2F%28cosxcosy%29%29=1%2Btanxtany ALIGN=MIDDLE  ALT=\"cos%28x-y%29=%281%2B%28sinxsiny%29%2F%28cosxcosy%29%29=1%2Btanxtany\"   DISABLED_style= \"max-width:90%; height:auto;\" > </SPAN>\n" );
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