document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1109011>Question 1109011</A>: <I><SPAN STYLE=\"word-break: break-all;\"> How do you do this question without a calculator?\r<BR>\n" );
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document.write( "cot^2 90 - sec^2 180 + csc^2 135 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #724029 by </B><A HREF=/tutors/aboutme.mpl?userid=Boreal><B>Boreal(15235)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Boreal><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=Boreal><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=724029\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> cotangent of 90 is cos 90/sin 90 or 0<BR>\n" );
document.write( "sec^2 of 180 is 1/cos^2 180 and cos of 180 is -1, so this is 1<BR>\n" );
document.write( "csc^2 of 135 is 1/ sin ^2 135 or 2/sqrt(2) * 2/sqrt(2)=2<BR>\n" );
document.write( "0-(1)+2=1<BR>\n" );
document.write( "One needs to know the sine and cosine of 45 (sqrt(2))/2, the cosine of 180 and the cosine of 90.<BR>\n" );
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