document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=164768>Question 164768</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I can not seem to solve the following Trigonometric Identity:\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=cot%5E2%28x%29-cos%5E2%28x%29=cos%5E2%28x%29cot%5E2%28x%29 ALIGN=MIDDLE  ALT=\"cot%5E2%28x%29-cos%5E2%28x%29=cos%5E2%28x%29cot%5E2%28x%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "I realize the left side is a difference of squares, but I'm not sure if that really is useful in solving (I came up with <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28cos%5E2%28x%29-cos%5E2%28x%29sin%5E2%28x%29%29%2Fsin%5E2%28x%29 ALIGN=MIDDLE  ALT=\"%28cos%5E2%28x%29-cos%5E2%28x%29sin%5E2%28x%29%29%2Fsin%5E2%28x%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >. On the right side I multiplied it out and came up with <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=cos%5E4%28x%29%2Fsin%5E2%28x%29 ALIGN=MIDDLE  ALT=\"cos%5E4%28x%29%2Fsin%5E2%28x%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >. Can you tell me what I've done wrong? Very appreciated. Thanks, Laura </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #121428 by </B><A HREF=/tutors/aboutme.mpl?userid=scott8148><B>scott8148(6628)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=scott8148><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=scott8148><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=121428\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> you're OK so far\r<BR>\n" );
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document.write( "multiplying by sin^2  __  cos^2-cos^2*sin^2=cos^4\r<BR>\n" );
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document.write( "substituting sin^2=1-cos^2 __ cos^2-cos^2(1-cos^2)=cos^4\r<BR>\n" );
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document.write( "cos^2-cos^2+cos^4=cos^4  __  cos^4=cos^4 </SPAN>\n" );
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