document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1163194>Question 1163194</A>: <I><SPAN STYLE=\"word-break: break-all;\"> prove that the given equation is an identity\r<BR>\n" );
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document.write( "cos(pi +x)=-cosx </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #787218 by </B><A HREF=/tutors/aboutme.mpl?userid=Alan3354><B>Alan3354(69443)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Alan3354><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=Alan3354><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=787218\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> prove that the given equation is an identity\r<BR>\n" );
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document.write( "cos(pi +x)=-cosx<BR>\n" );
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document.write( "cos(A+B) = cos(A)*cos(B) - sin(A)*sin(B)<BR>\n" );
document.write( "Sub pi and x for A & B<BR>\n" );
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