document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=871827>Question 871827</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Find the exact value of the expression, if it is defined. (If it is not defined, enter NONE.)\r<BR>\n" );
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document.write( "cos^-1(cos(-pi/2))\r<BR>\n" );
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document.write( "Now, I keep getting 1.570796327 as the answer but it keeps saying it is incorrect. I also tried pi/2 which is the same thing but it also says it is incorrect. Just a little confused. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #525755 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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=525755\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Find the exact value of the expression, if it is defined. (If it is not defined, enter NONE.) <BR>\n" );
document.write( "cos^-1(cos(-pi/2)) <BR>\n" );
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document.write( "Ans: -pi/2<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
document.write( "============= </SPAN>\n" );
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