document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=816479>Question 816479</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Can you help me prove the identity:\r<BR>\n" );
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document.write( "1+tan^2x=1/cos^2x\r<BR>\n" );
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document.write( "I don't understand how to solve this. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #491553 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=491553\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Can you help me prove the identity:<BR>\n" );
document.write( "1+tan^2x=1/cos^2x<BR>\n" );
document.write( "***<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=1%2Btan%5E2%28x%29=1%2Fcos%5E2%28x%29 ALIGN=MIDDLE  ALT=\"1%2Btan%5E2%28x%29=1%2Fcos%5E2%28x%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "..<BR>\n" );
document.write( "Start with the left side: (the more complex side)<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=1%2Btan%5E2%28x%29 ALIGN=MIDDLE  ALT=\"1%2Btan%5E2%28x%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "..<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=1%2B%28sin%5E2%28x%29%2Fcos%5E2%28x%29%29 ALIGN=MIDDLE  ALT=\"1%2B%28sin%5E2%28x%29%2Fcos%5E2%28x%29%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "..<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28cos%5E2%28x%29%2Bsin%5E2%28x%29%29%2Fcos%5E2%28x%29=1%2Fcos%5E2%28x%29 ALIGN=MIDDLE  ALT=\"%28cos%5E2%28x%29%2Bsin%5E2%28x%29%29%2Fcos%5E2%28x%29=1%2Fcos%5E2%28x%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "..<BR>\n" );
document.write( "verified: <BR>\n" );
document.write( "left side=right side </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );