document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=714759>Question 714759</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I need to prove this identity <BR>\n" );
document.write( "tan^2x-sin^2x = tan^2xsin^2x </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #438968 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=438968\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> I need to prove this identity <BR>\n" );
document.write( "tan^2x-sin^2x = tan^2xsin^2x<BR>\n" );
document.write( "start with left side:<BR>\n" );
document.write( "tan^2x-sin^2x<BR>\n" );
document.write( "=(sin^2x/cos^2x)-sin^2x<BR>\n" );
document.write( "=(sin^2x-sin^2xcos^2x)/cos^2x<BR>\n" );
document.write( "=sin^2x(1-cos^2x)/cos^2x<BR>\n" );
document.write( "=sin^2x*sin^2x/cos^2x<BR>\n" );
document.write( "=tan^2xsin^2x<BR>\n" );
document.write( "verified: <BR>\n" );
document.write( "left side=right side </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );