document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=433275>Question 433275</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Is cos^(-1) [cos (-pi/3)] = 1/2? Or is it - pi/3 since the functions are the same? (Cos and cos)?   </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #300334 by </B><A HREF=/tutors/aboutme.mpl?userid=Alan3354><B>Alan3354(69443)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Alan3354><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=Alan3354><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=300334\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> This is the inverse of the inverse.<BR>\n" );
document.write( "cos^-1 of the cos of (Value) = Value<BR>\n" );
document.write( "--> it's -pi/3<BR>\n" );
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document.write( "Because cos(-x) = cos(x), it can also be +pi/3<BR>\n" );
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