document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=628408>Question 628408</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Simplify the expression:<BR>\n" );
document.write( "cos(-x)/sin(-x) - cos(-x)/sin(x)\r<BR>\n" );
document.write( "\n" );
document.write( "Here is my solution which I am not sure if it is correct:<BR>\n" );
document.write( "cos(x)/-sin(x) + cos(x)/sin(x)<BR>\n" );
document.write( "= -cos(x)/sin(x) + cos(x)/sin(x)<BR>\n" );
document.write( "= 0\r<BR>\n" );
document.write( "\n" );
document.write( " </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #395597 by </B><A HREF=/tutors/aboutme.mpl?userid=Tatiana_Stebko><B>Tatiana_Stebko(1539)</B></A><img src=\"/images/stars/stars-12.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Tatiana_Stebko><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=Tatiana_Stebko><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=395597\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=cos%28-x%29%2Fsin%28-x%29+-+cos%28-x%29%2Fsinx+=cosx%2F%28-sinx+%29-+cosx%2Fsinx=-cosx%2Fsinx+-+cosx%2Fsinx=-cotx-cotx=-2cotx ALIGN=MIDDLE   DISABLED_style= \"max-width:90%; height:auto;\" > </SPAN>\n" );
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