document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=454345>Question 454345</A>: <I><SPAN STYLE=\"word-break: break-all;\"> How do you solve:\r<BR>\n" );
document.write( "\n" );
document.write( "3tan^2(x)+4sec(x)=-4 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #312085 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=312085\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> How do you solve: <BR>\n" );
document.write( "3tan^2(x)+4sec(x)=-4<BR>\n" );
document.write( "0<x<360º<BR>\n" );
document.write( "..<BR>\n" );
document.write( "3tan^2(x)+4sec(x)=-4<BR>\n" );
document.write( "Using identity: tan^(x)+1=sec^2(x)<BR>\n" );
document.write( "3(sec^2(x)-1)+4sec(x)=-4<BR>\n" );
document.write( "3sec^2(x)-3+4sec(x)=-4<BR>\n" );
document.write( "3sec^2(x)-3+4sec(x)+4=0<BR>\n" );
document.write( "3sec^2(x)+4sec(x)+1=0<BR>\n" );
document.write( "(3sec(x)+1)(sec(x)+1)=0<BR>\n" );
document.write( "sec(x)=-1/3<BR>\n" );
document.write( "cos(x)=-3 (reject, (-1 < cos(x) <1)<BR>\n" );
document.write( "sec(x)=-1<BR>\n" );
document.write( "cos(x)=-1<BR>\n" );
document.write( "x=180º or &#960; radians </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );