document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=751757>Question 751757</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Given cosA = -1/4 and 90 degrees < A < 180 degrees, find tanA in surd form. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #457541 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=457541\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Given cosA = -1/4 and 90 degrees < A < 180 degrees, find tanA in surd form<BR>\n" );
document.write( "sec(A)=1/cos(A)=-4<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=tan%28A%29=-sqrt%28sec%5E2%28A%29-1%29=-sqrt%2816-1%29=-sqrt%2815%29 ALIGN=MIDDLE  ALT=\"tan%28A%29=-sqrt%28sec%5E2%28A%29-1%29=-sqrt%2816-1%29=-sqrt%2815%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > (in Q2 where tan<0)<BR>\n" );
document.write( "..<BR>\n" );
document.write( "Check with calculator:<BR>\n" );
document.write( "cos(A)=-1/4<BR>\n" );
document.write( "A&#8776;104.4775º<BR>\n" );
document.write( "tan(A)=tan(104.4775º)&#8776;-3.873..<BR>\n" );
document.write( "Exact value=-&#8730;15&#8776;-3.873.. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );