document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=848289>Question 848289</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Use the sum-to-product formulas to write the difference as a product.<BR>\n" );
document.write( "cos(x + &#960;/3) &#8722; cos(x &#8722; &#960;/3)  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #511262 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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=511262\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Use the sum-to-product formulas to write the difference as a product.<BR>\n" );
document.write( "cos(x + &#960;/3) &#8722; cos(x &#8722; &#960;/3)<BR>\n" );
document.write( "--------------------------------<BR>\n" );
document.write( "cos(x)cos(pi/3) - sin(x)sin(pi/3) - [cos(x)(cos(pi/3)+sin(x)sin(pi/3)]<BR>\n" );
document.write( "-------------------------------<BR>\n" );
document.write( "= -2sin(x)[sqrt(3)/2)<BR>\n" );
document.write( "--------<BR>\n" );
document.write( "= -sqrt(3)*sin(x)<BR>\n" );
document.write( "=========================<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
document.write( "========================== <BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );