document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=928620>Question 928620</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Solve the following equation in the interval [0, 2pi]. <BR>\n" );
document.write( "Give the answer as a multiple of pi. Do not use decimal numbers. The answer should be a fraction or an integer. <BR>\n" );
document.write( "2(cos(t))^2-cos(t)-1=0. <BR>\n" );
document.write( "I really need some help figuring this out, please.<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #563787 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=563787\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Solve the following equation in the interval [0, 2pi]. <BR>\n" );
document.write( "2(cos(t))^2-cos(t)-1=0. <BR>\n" );
document.write( "(2cos(t)+1)(cos(t)-1)=0<BR>\n" );
document.write( "..<BR>\n" );
document.write( "2cos(t)+1=0<BR>\n" );
document.write( "cos(t)=-1/2<BR>\n" );
document.write( "t=2&#960;/3, 4&#960;/3<BR>\n" );
document.write( "..<BR>\n" );
document.write( "cos(t)-1=0<BR>\n" );
document.write( "cos(t)=1<BR>\n" );
document.write( "t=0, 2&#960;\r<BR>\n" );
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