document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=543342>Question 543342</A>: <I><SPAN STYLE=\"word-break: break-all;\"> evaluate the following:\r<BR>\n" );
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document.write( "sin^-1 (Cos 2pi/3) </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #354949 by </B><A HREF=/tutors/aboutme.mpl?userid=lwsshak3><B>lwsshak3(11628)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=lwsshak3><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=354949\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> evaluate the following: <BR>\n" );
document.write( "sin^-1 (Cos 2pi/3)<BR>\n" );
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document.write( "Cos (2&#960;/3) =-1/2 ( reference angle of &#960;/3 in quadrant II where cos<0<BR>\n" );
document.write( "sin^-1 (Cos 2pi/3)=sin^-1 (-1/2)=-&#960;/6<BR>\n" );
document.write( "note: domain of sin^-1 is [-&#960;/2,&#960;/2] </SPAN>\n" );
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