document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=148293>Question 148293</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Hi,\r<BR>\n" );
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document.write( "Question is solve the equation on the interval [0,2Pi0.\r<BR>\n" );
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document.write( "2cos^2x+sinx-2=0\r<BR>\n" );
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document.write( "Since cos^2x= 1-sin^2x I substituded this:\r<BR>\n" );
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document.write( "2(1-sin^2x) + sinx-2=0 to get<BR>\n" );
document.write( "-2sin^2x + sinx=0 since -2 and +2 cancel eachother out. I am lost after this and the calculator hmm don't know whats worse figuring out the calculator or the math problem. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #108694 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=108694\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Question is solve the equation on the interval [0,2Pi]. <BR>\n" );
document.write( "2cos^2x+sinx-2=0 <BR>\n" );
document.write( "Since cos^2x= 1-sin^2x I substituded this: <BR>\n" );
document.write( "2(1-sin^2x) + sinx-2=0 to get<BR>\n" );
document.write( "-2sin^2x + sinx=0 since -2 and +2 cancel each other out.<BR>\n" );
document.write( "2sin^2x - sinx = 0<BR>\n" );
document.write( "Now factor to get:<BR>\n" );
document.write( "sinx(2sinx-1) = 0<BR>\n" );
document.write( "sinx = 0 or 2sinx = 1<BR>\n" );
document.write( "sinx = 0 or sinx = 1/2<BR>\n" );
document.write( "x = 0,pi,2pi or x = pi/6,(5/6)pi <BR>\n" );
document.write( "===============<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
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