document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=535158>Question 535158</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Match the trigonometric expression cos^2 x(sec^2 x-1)<BR>\n" );
document.write( "to one of the following: <BR>\n" );
document.write( "a)cscx <BR>\n" );
document.write( "b)tanx<BR>\n" );
document.write( "c)sin^2x<BR>\n" );
document.write( "d)sinx tanx<BR>\n" );
document.write( "e)sec^2x<BR>\n" );
document.write( "f)sec^2x + tan^2x\r<BR>\n" );
document.write( "\n" );
document.write( "No idea how to do this. Please help? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #351777 by </B><A HREF=/tutors/aboutme.mpl?userid=Alan3354><B>Alan3354(69443)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Alan3354><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=Alan3354><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=351777\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> cos^2 x(sec^2 x-1)<BR>\n" );
document.write( "-------------<BR>\n" );
document.write( "Change to sines and cosines. ALWAYS do that.<BR>\n" );
document.write( "= cos^2*(1/cos^2 - 1)<BR>\n" );
document.write( "= 1 - cos^2<BR>\n" );
document.write( "= sin^2(x)<BR>\n" );
document.write( "----------<BR>\n" );
document.write( "Always start with that. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );