document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=923467>Question 923467</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Find the exact value of sin (arccos[-2/5]) </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #560083 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=560083\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Find the exact value of sin (arccos[-2/5])<BR>\n" );
document.write( "(arccos[-2/5]) reads:<BR>\n" );
document.write( "the angle x whose cos=-2/5<BR>\n" );
document.write( "cosx=-2/5<BR>\n" );
document.write( "sin(arccos[-2/5])=sinx=&#8730;(1-cos^2x)=&#8730;(1-4/25)=&#8730;(21/25)=&#8730;21/5 </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );