document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=518470>Question 518470</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Use an addition or subtraction formula to find the exact value of the expression.\r<BR>\n" );
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document.write( "sin(13&#960;/12) </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #346943 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=346943\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Use an addition or subtraction formula to find the exact value of the expression. <BR>\n" );
document.write( "sin(13&#960;/12)<BR>\n" );
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document.write( "sin(13&#960;/12)=sin(9&#960;/12+4&#960;/12)=sin(3&#960;/4+&#960;/3)<BR>\n" );
document.write( "Identity: sin(s+t)=sin s cos t+cos s sin t<BR>\n" );
document.write( "sin(3&#960;/4+&#960;/3)=sin 3&#960;/4 cos &#960;/3+cos 3&#960;/4 sin &#960;/3<BR>\n" );
document.write( "=&#8730;2/2*1/2-&#8730;2/2*&#8730;3/2<BR>\n" );
document.write( "=&#8730;2/4-&#8730;6/4<BR>\n" );
document.write( "=(&#8730;2-&#8730;6)/4 </SPAN>\n" );
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