document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1178161>Question 1178161</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Solve the equation, where 0° ≤ x < 360°.\r<BR>\n" );
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document.write( "2 sin^2 x = 1 − cos x </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #807327 by </B><A HREF=/tutors/aboutme.mpl?userid=Boreal><B>Boreal(15235)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Boreal><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=Boreal><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=807327\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> sin^2 x=1-cos^2 x<BR>\n" );
document.write( "so 2-2cos^2x=1-cos x<BR>\n" );
document.write( "0=2 cos^2 x-cos x -1<BR>\n" );
document.write( "0=(2 cos x+1)(cos x-1)<BR>\n" );
document.write( "cos x =-0.5<BR>\n" );
document.write( "cos x=+1<BR>\n" );
document.write( "x=0 degrees, 120 degrees, 240 degrees<BR>\n" );
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