document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=889157>Question 889157</A>: <I><SPAN STYLE=\"word-break: break-all;\"> How do i verify the identity of cos2A=cotA-tanA/cscAsecA </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #537938 by </B><A HREF=/tutors/aboutme.mpl?userid=solver91311><B>solver91311(24713)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=solver91311><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=solver91311><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=537938\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <font face=\"Times New Roman\" size=\"+2\">\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=\"/cgi-bin/rendertex.cgi?\LARGE \ \ \ \ \ \ \ \ \ \ \frac{\cot A\ -\ \tan A}{\csc A\sec A}\ =\ \frac{\frac{\cos A}{\sin A}\ -\ \frac{\sin A}{\cos A}}{\csc A\sec A}\ =\ \frac{\frac{\cos^2 A\ -\ \sin^2 A}{\sin A\cos A}}{\csc A\sec A}\ =\ \frac{\left(\cos^2 A\ -\ \sin^2 A\right)\left(\csc A\sec A\right)}{\csc A\sec A}\ =\ \cos^2 A\ -\ \sin^2 A\ =\ \cos 2A\">\r<BR>\n" );
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document.write( "Therefore\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=\"/cgi-bin/rendertex.cgi?\LARGE \ \ \ \ \ \ \ \ \ \ \cos 2A \equiv\ \frac{\cot A\ -\ \tan A}{\csc A\sec A}\">\r<BR>\n" );
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document.write( "John<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=\"/cgi-bin/rendertex.cgi?\LARGE e^{i\pi}\ +\ 1\ =\ 0\"><BR>\n" );
document.write( "My calculator said it, I believe it, that settles it<BR>\n" );
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