document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=175837>Question 175837</A>: <I><SPAN STYLE=\"word-break: break-all;\"> 17. find the exact value of cos 5pi/12 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #130949 by </B><A HREF=/tutors/aboutme.mpl?userid=Mathtut><B>Mathtut(3670)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Mathtut><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=130949\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> cos(5&#960;/12) = cos(&#960;/6 + &#960;/4)\r<BR>\n" );
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document.write( "cos (a + b) = cos a cos b - sin a sin b<BR>\n" );
document.write( "cos (&#960;/6 + &#960;/4) = cos &#960;/6 cos &#960;/4 - sin &#960;/6 sin &#960;/4<BR>\n" );
document.write( "= &#8730;3 / 2 * &#8730;2 / 2 - 1/2 * &#8730;2 / 2<BR>\n" );
document.write( "= &#8730;6 / 4 - &#8730;2 / 4<BR>\n" );
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