document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=845370>Question 845370</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Hello, could you please help me?\r<BR>\n" );
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document.write( "I need to prove the following trig identity\"\r<BR>\n" );
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document.write( "(tan 4t - tan 2t)/ (1+ tan4t tan2t) = (2tan t)/ (1-tan^2 t)\r<BR>\n" );
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document.write( "I know that it involves the sum and difference identities, but I don't know how to go about solving it. Any help would be greatly appreciated. Each side is supposed to be in the form of a fraction. Thank  you! </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #509327 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=509327\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> I need to prove the following trig identity\" <BR>\n" );
document.write( "(tan 4t - tan 2t)/ (1+ tan4t tan2t) = (2tan t)/ (1-tan^2 t) <BR>\n" );
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document.write( "The left side is tan(4t-2t) = tan(2t)<BR>\n" );
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document.write( "The right side is tan(t + t) = tan(2t)<BR>\n" );
document.write( "===================<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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