document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=454002>Question 454002</A>: <I><SPAN STYLE=\"word-break: break-all;\"> solve  cos(x/2)=(&#8730;2/2)  if 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 #311900 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=311900\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> solve cos(x/2)=(&#8730;2/2) if 0<=x<360<BR>\n" );
document.write( "..<BR>\n" );
document.write( "cos(x/2)=sqrt((1+cos x)/2)=&#8730;2/2<BR>\n" );
document.write( "square both sides<BR>\n" );
document.write( "((1+cos x)/2)=2/4=2/4=1/2<BR>\n" );
document.write( "1+ cos x=1<BR>\n" );
document.write( "cos x=0<BR>\n" );
document.write( "x=&#960;/2,3&#960;/2 </SPAN>\n" );
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