document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1111487>Question 1111487</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Convert the polar equation to rectangular coordinates. (Use variables x and y as needed.)<BR>\n" );
document.write( "cos(2&#952;)=&#8722;1 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #726487 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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=726487\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Convert the polar equation to rectangular coordinates. (Use variables x and y as needed.)<BR>\n" );
document.write( "cos(2&#952;)=&#8722;1<BR>\n" );
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document.write( "cos^2(t)-sin^2(t) = -1<BR>\n" );
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document.write( "Note:: cos(t) = x/r ; sin(t) = y/r<BR>\n" );
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document.write( "(x/r)^2 - (y/r)^2 = -1<BR>\n" );
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document.write( "x^2 - y^2 = -r^2<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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document.write( " <BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );