document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=206389>Question 206389</A>: <I><SPAN STYLE=\"word-break: break-all;\"> cos^2x - sin^2x = sin x<BR>\n" );
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document.write( "with x greater than negative pi and less than or = pi </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #155956 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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=155956\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> cos^2x - sin^2x = sin x\r<BR>\n" );
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document.write( "with x greater than negative pi and less than or = pi<BR>\n" );
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document.write( "(1-sin^2(x))-sin^2(x) = sin(x)<BR>\n" );
document.write( "1 - 2sin^2(x) = sin(x)<BR>\n" );
document.write( "2sin^2(x)+sinx -1 = 0<BR>\n" );
document.write( "Factor to get:<BR>\n" );
document.write( "(2sin(x)-1)(sin(x)+1) = 0<BR>\n" );
document.write( "sin(x) = 1/2 or sin(x) = -1<BR>\n" );
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document.write( "If sin(x) = 1/2, x = pi/6 or x = (5/6)pi<BR>\n" );
document.write( "If sin(x) = -1, x = (3/2)pi<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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