document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=712339>Question 712339</A>: <I><SPAN STYLE=\"word-break: break-all;\"> solve each equation \r<BR>\n" );
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document.write( "15)  sin(2 theta) +sin( 4 theta) = 0 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #438024 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=438024\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> sin(2 theta) +sin( 4 theta) = 0<BR>\n" );
document.write( "sin2x +sin4x =0<BR>\n" );
document.write( "sin2x+2sin2x+cos2x=0<BR>\n" );
document.write( "sin2x(1+cos2x)=0<BR>\n" );
document.write( "sin2x=0<BR>\n" );
document.write( "2x=0<BR>\n" );
document.write( "x=0<BR>\n" );
document.write( "or<BR>\n" );
document.write( "1+cos2x=0<BR>\n" );
document.write( "cos2x=-1<BR>\n" );
document.write( "2x=3&#960;/2<BR>\n" );
document.write( "x=3&#960;/4 </SPAN>\n" );
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