document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=410609>Question 410609</A>: <I><SPAN STYLE=\"word-break: break-all;\"> how to verify the identity of problem\r<BR>\n" );
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document.write( "tan^2(x)-sin^2(x)=sin^4(x)sec^2(x) </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #288888 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=288888\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> how to verify the identity of problem<BR>\n" );
document.write( "tan^2(x)-sin^2(x)=sin^4(x)sec^2(x)<BR>\n" );
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document.write( "tan^2(x)-sin^2(x)=sin^4(x)sec^2(x)<BR>\n" );
document.write( "starting with the right-hand side,<BR>\n" );
document.write( "sin^4(x)sec^2(x)<BR>\n" );
document.write( "=(sin^2)(sin^2)(1/cos^2)<BR>\n" );
document.write( "=(sin^2/cos^2)*sin^2<BR>\n" );
document.write( "=tan^2*sin^2<BR>\n" );
document.write( "=tan^2*(1-cos^2)<BR>\n" );
document.write( "=tan^2-tan^2*cos^2<BR>\n" );
document.write( "=tan^2-(sin^2/cos^2)*cos^2<BR>\n" );
document.write( "=tan^2-sin^2<BR>\n" );
document.write( "verified: right-hand side=left-hand side </SPAN>\n" );
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