document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=208934>Question 208934</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Find the exact value of each expression.<BR>\n" );
document.write( "a) cot^-1 (1)<BR>\n" );
document.write( "and<BR>\n" );
document.write( "b) arccos(&#8730;2/2) </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #158425 by </B><A HREF=/tutors/aboutme.mpl?userid=RAY100><B>RAY100(1637)</B></A><img src=\"/images/stars/stars-12.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=RAY100><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=158425\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> both  are  45 degrees,,,,,which  has  sides 1-1-sqrt2,,,or  sqrt2-sqrt2-2<BR>\n" );
document.write( ".<BR>\n" );
document.write( "check,  cot =1/1,,,,ok<BR>\n" );
document.write( ",<BR>\n" );
document.write( "cos = 1/sqrt2 or sqrt2/2<BR>\n" );
document.write( ".<BR>\n" );
document.write( "ok<BR>\n" );
document.write( ".<BR>\n" );
document.write( "since  tan/cot positive  in  quadrant 3,  (a) could  also  be  225  degrees<BR>\n" );
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document.write( "and  since  cos  is  positive  in  quadrant  4, (b)  could also be 315 degrees<BR>\n" );
document.write( " </SPAN>\n" );
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