document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=433747>Question 433747</A>: <I><SPAN STYLE=\"word-break: break-all;\"> prove the idenity true<BR>\n" );
document.write( "sec^4x-(tan^4x+sec^2x)=sec^2x*sin^2x </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #301926 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=301926\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> prove the idenity true<BR>\n" );
document.write( "sec^4x-(tan^4x+sec^2x)=sec^2x*sin^2x<BR>\n" );
document.write( "starting with left side<BR>\n" );
document.write( "sec^4x-(tan^4x+sec^2x)<BR>\n" );
document.write( "1/cos^4-sin^4/cos^4-1/cos^2<BR>\n" );
document.write( "LCD:cos^4<BR>\n" );
document.write( "(1-sin^4-cos^2)/cos^4<BR>\n" );
document.write( "(sin^2-sin^4)/cos^4<BR>\n" );
document.write( "sin^2(1-sin^2)/cos^4<BR>\n" );
document.write( "sin^2*cos^2/cos^4<BR>\n" );
document.write( "sin^2/cos^2<BR>\n" );
document.write( "sin^2*sec^2<BR>\n" );
document.write( "left side=right side </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );