document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=964553>Question 964553</A>: <I><SPAN STYLE=\"word-break: break-all;\"> FInd all solutions 2 cos 2&#952; &#8722; 1 = 0\r<BR>\n" );
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document.write( "Find all solutions of the equation.<BR>\n" );
document.write( "&#952; =   \r<BR>\n" );
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document.write( "(b) Find the solutions in the interval [0, 2&#960;).<BR>\n" );
document.write( "&#952; =\r<BR>\n" );
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document.write( "Please explain Thanks! </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #589417 by </B><A HREF=/tutors/aboutme.mpl?userid=t0hierry><B>t0hierry(194)</B></A><img src=\"/images/stars/stars-09.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=t0hierry><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=t0hierry><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=589417\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 2cos 2 theta = 1<BR>\n" );
document.write( "cos 2 theta = 1/2 = 2 cos^2 theta - 1<BR>\n" );
document.write( "2cos^2 theta = 3/2<BR>\n" );
document.write( "cos^2 theta = 3/4<BR>\n" );
document.write( "cos theta = (sqrt3)/2<BR>\n" );
document.write( "theta = pi/6<BR>\n" );
document.write( "other solution: 2 pi - pi/6 = 11pi/6 </SPAN>\n" );
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