document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=769869>Question 769869</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Solve 10cosx^2-12cosx-7=0. Use degrees and round your answer to the nearest hundredth. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #469096 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=469096\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Solve 10cosx^2-12cosx-7=0. Use degrees and round your answer to the nearest hundredth.<BR>\n" );
document.write( "10cos^2x-12cosx-7=0<BR>\n" );
document.write( "use quadratic formula to solve for cosx<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=cosx+=+%28-b+%2B-+sqrt%28+b%5E2-4%2Aa%2Ac+%29%29%2F%282%2Aa%29+ ALIGN=MIDDLE  ALT=\"cosx+=+%28-b+%2B-+sqrt%28+b%5E2-4%2Aa%2Ac+%29%29%2F%282%2Aa%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" > <BR>\n" );
document.write( "a=10, b=-12, c=-7<BR>\n" );
document.write( "Ans:<BR>\n" );
document.write( "cosx=1.629 (reject, -1 < cosx < 1)<BR>\n" );
document.write( "or<BR>\n" );
document.write( "cosx=-0.430 </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );