document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=811280>Question 811280</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Help with this problem?? I keep getting it wrong. \r<BR>\n" );
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document.write( "Find the exact value of the expression. arctan(tan 5pi/7) And the answer is not pi/7 and I don't know why! What is the answer? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #488684 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=488684\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Find the exact value of the expression. <BR>\n" );
document.write( "arctan(tan 5&#960;/7)<BR>\n" );
document.write( "Reads:The tan of an angle whose tan=5&#960;/7<BR>\n" );
document.write( "So,arctan(tan 5&#960;/7)=5&#960;/7<BR>\n" );
document.write( "..<BR>\n" );
document.write( "Similarly, arcsin(sin30&#730;)=30&#730;<BR>\n" );
document.write( "arcsin(sin30&#730;)=arcsin(1/2)=30&#730;<BR>\n" );
document.write( "or<BR>\n" );
document.write( "arccos(cos(x))=x <BR>\n" );
document.write( "  </SPAN>\n" );
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