document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1067701>Question 1067701</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Can somebody help me by writing 4 cos 2&#952; sin 4&#952; as a sum or difference? Ty. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #682831 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=682831\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Can somebody help me by writing 4 cos 2&#952; sin 4&#952; as a sum or difference? <BR>\n" );
document.write( "-----<BR>\n" );
document.write( "a+b = 40<BR>\n" );
document.write( "a-b = 20<BR>\n" );
document.write( "----<BR>\n" );
document.write( "2a = 60<BR>\n" );
document.write( "a = 30<BR>\n" );
document.write( "Then b = 10<BR>\n" );
document.write( "------------------------<BR>\n" );
document.write( "4[cos(20)*sin(40)] = 4[cos(20-40)+cos(20+40)]<BR>\n" );
document.write( "= 4[cos(20)+cos(60)]<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" );