document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1029580>Question 1029580</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Help, please!!!  I am supposed to circle all expressions that are equivalent to sin 4a.  options are:<BR>\n" );
document.write( "4 sin a cos a<BR>\n" );
document.write( "2 sin 2a cos 2a<BR>\n" );
document.write( "4 sin a cos a-8 sin^3 a cos a<BR>\n" );
document.write( "4 sin a cos a cos 2a<BR>\n" );
document.write( "sin a cos 3a-cos a sin 3a<BR>\n" );
document.write( "4 sin a cos^3 a-4 sin^3 a cos a<BR>\n" );
document.write( "I know the last one is equal to 4a, but I'm not sure if this is the only one or not.  Thanks for any help! </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #644566 by </B><A HREF=/tutors/aboutme.mpl?userid=ikleyn><B>ikleyn(52790)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ikleyn><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=ikleyn><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=644566\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> .<BR>\n" );
document.write( "Help, please!!!  I am supposed to circle all expressions that are equivalent to sin 4a.  options are:\r<BR>\n" );
document.write( "\n" );
document.write( "A) 4 sin a cos a<BR>\n" );
document.write( "B) 2 sin 2a cos 2a<BR>\n" );
document.write( "C) 4 sin a cos a-8 sin^3 a cos a<BR>\n" );
document.write( "D) 4 sin a cos a cos 2a<BR>\n" );
document.write( "E) sin a cos 3a-cos a sin 3a<BR>\n" );
document.write( "F) 4 sin a cos^3 a-4 sin^3 a cos a\r<BR>\n" );
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document.write( "I know the last one is equal to 4a, but I'm not sure if this is the only one or not.  Thanks for any help!<BR>\n" );
document.write( "~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\r<BR>\n" );
document.write( "<BR>\n" );
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document.write( "Options B), D), F)\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );