document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1165239>Question 1165239</A>: <I><SPAN STYLE=\"word-break: break-all;\"> values of trig functions <BR>\n" );
document.write( "cot(-120) degrees </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #789737 by </B><A HREF=/tutors/aboutme.mpl?userid=Seutip><B>Seutip(231)</B></A><img src=\"/images/stars/stars-09.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Seutip><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=Seutip><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=789737\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Values of trig functions<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=cot%28-120%29+=+1%2Ftan%28-120%29 ALIGN=MIDDLE  ALT=\"cot%28-120%29+=+1%2Ftan%28-120%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=cot%28-120%29=1%2Ftan%28-120%2B360%29 ALIGN=MIDDLE  ALT=\"cot%28-120%29=1%2Ftan%28-120%2B360%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > when you add 360 its ok and will produce same value because it just means one circle, or one revolution<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=cot%28-120%29=1%2Ftan%28240%29 ALIGN=MIDDLE  ALT=\"cot%28-120%29=1%2Ftan%28240%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "We all know that<BR>\n" );
document.write( "tan 240° = tan (180°+60°)<BR>\n" );
document.write( "And tan(180)=0 leaving us with tan(60°)<BR>\n" );
document.write( "And we all know that the value for tan(60) is = √3<BR>\n" );
document.write( "∴tan 240°=√3<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=cot%28-120%29=1%2Ftan%28240%29 ALIGN=MIDDLE  ALT=\"cot%28-120%29=1%2Ftan%28240%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "cot(-120)=(1/√3) <BR>\n" );
document.write( "cot(-120)=(1/√3)(√3/√3) we multiply  √3/√3 to rationalize\r<BR>\n" );
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document.write( "Therefore:<BR>\n" );
document.write( "cot(-120)=(√3/3) \r<BR>\n" );
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document.write( "Hope that helps.  </SPAN>\n" );
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