document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=933012>Question 933012</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I need help using the unit circle. The Question is find the exact value of cos(-13pi/4) </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #566524 by </B><A HREF=/tutors/aboutme.mpl?userid=ewatrrr><B>ewatrrr(24785)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ewatrrr><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=ewatrrr><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=566524\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Proper form is found by adding multiple if 2pi<BR>\n" );
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document.write( "cos(-13pi/4) = cos(-13pi/4 + 16pi/4) = cos(3pi/4) = -&#8730;2 /2<BR>\n" );
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document.write( "(cosx, sinx) Summary Unit Circle<BR>\n" );
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