document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1178306>Question 1178306</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Verify the given identity.<BR>\n" );
document.write( "sin 4x = 4 sin x cos3 x − 4 cos x sin3 x<BR>\n" );
document.write( "Repeatedly use the Double-Angle Identities as needed, and then multiply out the products. (Simplify completely at each step.)\r<BR>\n" );
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document.write( "sin 4x = 	2(sin 2x) (cos(2x))<BR>\n" );
document.write( "=2(2 sin x)(blank))(cos^2 x −  sin(x)^2<BR>\n" );
document.write( "=4 sin x cos^3 x − (blank)\r<BR>\n" );
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document.write( "I just need help filling in the two blanks. I did 2 of them already but just don't know what the other 2 are.\r<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #807518 by </B><A HREF=/tutors/aboutme.mpl?userid=MathLover1><B>MathLover1(20850)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=MathLover1><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=MathLover1><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=807518\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <BR>\n" );
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document.write( "Repeatedly use the Double-Angle Identities as needed, and then multiply out the products. (Simplify completely at each step.)\r<BR>\n" );
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