document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=961738>Question 961738</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Use an identity to find the exact value of each expression: <BR>\n" );
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document.write( "cos(271)cos(61)+sin(271)sin(61)=\r<BR>\n" );
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document.write( "cos(105)cos(225)&#8722;sin(105)sin(225)= </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #587909 by </B><A HREF=/tutors/aboutme.mpl?userid=Fombitz><B>Fombitz(32388)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Fombitz><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=Fombitz><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=587909\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Use these formulas,<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=cos%28x%2By%29=cos%28x%29cos%28y%29-sin%28x%29sin%28y%29 ALIGN=MIDDLE  ALT=\"cos%28x%2By%29=cos%28x%29cos%28y%29-sin%28x%29sin%28y%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=cos%28x%29cos%28y%29%2Bsin%28x%29sin%28y%29 ALIGN=MIDDLE  ALT=\"cos%28x-y%29=cos%28x%29cos%28y%29%2Bsin%28x%29sin%28y%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > </SPAN>\n" );
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