document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=707360>Question 707360</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Use properties of the trigonometric functionS<BR>\n" );
document.write( " to find the exact value of sec^2 18 -tan^2 18 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #435743 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=435743\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Use properties of the trigonometric functionS<BR>\n" );
document.write( "to find the exact value of sec^2 18 -tan^2 18<BR>\n" );
document.write( "**<BR>\n" );
document.write( "Pythagorean Identity:<BR>\n" );
document.write( "tan^2x+1=sec^2x<BR>\n" );
document.write( "sec^2x-tan^2x=1<BR>\n" );
document.write( "so,<BR>\n" );
document.write( "sec^2 18 -tan^2 18=1 </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );