document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=448352>Question 448352</A>: <I><SPAN STYLE=\"word-break: break-all;\"> can you please help me solve this trigonometric equation:\r<BR>\n" );
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document.write( "2sin^2x-cosx-1=0 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #308649 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=308649\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> can you please help me solve this trigonometric equation: <BR>\n" );
document.write( "2sin^2x-cosx-1=0<BR>\n" );
document.write( "..<BR>\n" );
document.write( "for 0<x<2&#960;<BR>\n" );
document.write( "2sin^2x-cosx-1=0<BR>\n" );
document.write( "2(1-cos^2x)-cosx-1=0<BR>\n" );
document.write( "2-2cos^2x-cosx-1=0<BR>\n" );
document.write( "-2cos^2x-cosx+1=0<BR>\n" );
document.write( "2cos^2x+cosx-1=0<BR>\n" );
document.write( "(2cosx-1)(cosx+1)=0<BR>\n" );
document.write( "2cosx-1=0<BR>\n" );
document.write( "cosx=1/2<BR>\n" );
document.write( "x=&#960;/3,5&#960;/3<BR>\n" );
document.write( "..<BR>\n" );
document.write( "cosx+1=0<BR>\n" );
document.write( "cosx=-1<BR>\n" );
document.write( "x=&#960;<BR>\n" );
document.write( "..<BR>\n" );
document.write( "ans:<BR>\n" );
document.write( "x=&#960;, &#960;/3, 5&#960;/3 </SPAN>\n" );
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