document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=303127>Question 303127</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The solutions of cos 2x = 0, in the interval 0 < x < 360 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #217243 by </B><A HREF=/tutors/aboutme.mpl?userid=nerdybill><B>nerdybill(7384)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=nerdybill><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=nerdybill><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=217243\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The solutions of cos 2x = 0, in the interval 0 < x < 360<BR>\n" );
document.write( ".<BR>\n" );
document.write( "If we <BR>\n" );
document.write( "Let y=2x<BR>\n" );
document.write( "then we can rewrite<BR>\n" );
document.write( "cos 2x = 0<BR>\n" );
document.write( "as<BR>\n" );
document.write( "cos y = 0<BR>\n" );
document.write( ".<BR>\n" );
document.write( "From the \"unit circle\" we know that this will be true when<BR>\n" );
document.write( "y = 90 deg and 270 deg<BR>\n" );
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document.write( "Now to find 'x':<BR>\n" );
document.write( "y=2x<BR>\n" );
document.write( "set y=90<BR>\n" );
document.write( "90=2x<BR>\n" );
document.write( "45 deg = x<BR>\n" );
document.write( ".<BR>\n" );
document.write( "set y=270<BR>\n" );
document.write( "270=2x<BR>\n" );
document.write( "135=x<BR>\n" );
document.write( ".<BR>\n" );
document.write( "solution: 90 deg and 135 deg<BR>\n" );
document.write( " </SPAN>\n" );
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