document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1154342>Question 1154342</A>: <I><SPAN STYLE=\"word-break: break-all;\"> 2sin^2 x+15cosx-9=0 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #776748 by </B><A HREF=/tutors/aboutme.mpl?userid=mananth><B>mananth(16949)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=mananth><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=mananth><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=776748\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 2sin^2 x+15cosx-9=0\r<BR>\n" );
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document.write( "2(1-cos^2x) +15 cosx -9=0\r<BR>\n" );
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document.write( "2-2cos^2x +15cosx -9=0\r<BR>\n" );
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document.write( "2cos^2x -15cosx +7=0\r<BR>\n" );
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document.write( "2cos^2x -14cosx-cosx +7=0\r<BR>\n" );
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document.write( "2cosx(cosx-7)-1(cosx-7)=0\r<BR>\n" );
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document.write( "(cosx-7)(2cosx-1)=0\r<BR>\n" );
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document.write( "cosx =7 , or cos x =1/2\r<BR>\n" );
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