document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=859638>Question 859638</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Can you show me step by step how to get this done cos^2 theta - sin^2 theta/ 1-TAN THETA= COS^2THETA? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #517866 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=517866\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\">  Can you show me step by step how to get this done cos^2 theta - sin^2 theta/ 1-TAN THETA= COS^2THETA?<BR>\n" );
document.write( "------------<BR>\n" );
document.write( "[cos^2(t) - sin^2(t)]/[(1-tan(t)] = cos^(t)<BR>\n" );
document.write( "Cross-multiply to get::<BR>\n" );
document.write( "[cos^2(t)-sin^2(t)] = cos(t) - sin^(t)<BR>\n" );
document.write( "-------<BR>\n" );
document.write( "Divide both sides by cos(t)-sin(t) to get:<BR>\n" );
document.write( "cos(t)+sin(t) = 0<BR>\n" );
document.write( "cos(t) = -sin(t)<BR>\n" );
document.write( "cos(t) = -cos(pi/2 -t)<BR>\n" );
document.write( "t = pi/2 -t<BR>\n" );
document.write( "2t = pi/2<BR>\n" );
document.write( "t = pi/4<BR>\n" );
document.write( "------------------<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );