document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=275502>Question 275502</A>: <I><SPAN STYLE=\"word-break: break-all;\"> verify that the given equation is an identity:<BR>\n" );
document.write( "tan2x = 2cotx/cot^2 x - 1 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #200936 by </B><A HREF=/tutors/aboutme.mpl?userid=Greenfinch><B>Greenfinch(383)</B></A><img src=\"/images/stars/stars-10.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Greenfinch><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/cgi-bin/show-face.mpl?user=Greenfinch><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=200936\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> tan 2x = sin 2x/cos 2x=( 2 sin x cos x)/(cos^2 x- sin^2 x) Divide by sin^2 x<BR>\n" );
document.write( "=( 2 cos x/ sin x)/(cos^2x/sin^2 x) - (sin^2 x / sin^2 x)<BR>\n" );
document.write( "= 2 cot x/ (cot^2 x - 1) </SPAN>\n" );
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