document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=677926>Question 677926</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Solve for x in [0,2pi]:<BR>\n" );
document.write( "cos x - sin x = -1 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #421183 by </B><A HREF=/tutors/aboutme.mpl?userid=lwsshak3><B>lwsshak3(11628)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=lwsshak3><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=421183\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Solve for x in [0,2pi]:<BR>\n" );
document.write( "cos x - sin x = -1<BR>\n" );
document.write( "square both sides<BR>\n" );
document.write( "cos^2x-2sinxcosx+sin^2x=1<BR>\n" );
document.write( "-sin(2x)+1=1<BR>\n" );
document.write( "-sin(2x)=0<BR>\n" );
document.write( "2x=0,&#960;<BR>\n" );
document.write( "x=0, &#960;/2<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );