document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=860397>Question 860397</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Rotate the axes and eliminate the xy term of 3x^2 + 2xy + 3y^2 -8 = 0,  Please include details on how to solve.  Thank you </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #518447 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=518447\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Rotate the axes and eliminate the xy term of 3x^2 + 2xy + 3y^2 -8 = 0, Please include details on how to solve.<BR>\n" );
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document.write( "Form: Ax^2 + Bxy + cy^2 + Dx + Ey + F = 0<BR>\n" );
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document.write( "Convert to x'/y' axes using:<BR>\n" );
document.write( "x = x'cos(t)-y'sin(t)<BR>\n" );
document.write( "y = x'sin(t)+y'cos(t)<BR>\n" );
document.write( "and cot(2t) = (A-C)/B<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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document.write( " </SPAN>\n" );
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