document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=855191>Question 855191</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Simplify[ 2tan(x/2)]1-tan^2(x/2)] </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #515482 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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=515482\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\">  Simplify[ 2tan(x/2)]1-tan^2(x/2)]<BR>\n" );
document.write( "--------<BR>\n" );
document.write( "(2(sin/cos))(1 - sin^2/cos^2)<BR>\n" );
document.write( "--------<BR>\n" );
document.write( "2(sin/cos)(cos^2-sin^2)/cos^2<BR>\n" );
document.write( "--------\r<BR>\n" );
document.write( "\n" );
document.write( "[(2sin*cos/cos^2][cos(2(x/2))/cos^2]<BR>\n" );
document.write( "---------<BR>\n" );
document.write( "[2sin(2(x/2))/cos^2]<BR>\n" );
document.write( "----------<BR>\n" );
document.write( "[2sin(x)/cos^2(x/2)]*cos(x)/cos^2(x/2)]<BR>\n" );
document.write( "-----<BR>\n" );
document.write( "(2sin(x)cos(x)]/cos^4(x/2)<BR>\n" );
document.write( "------<BR>\n" );
document.write( "sin(2x)/cos^4(x/2)<BR>\n" );
document.write( "=========================<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );