document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1103102>Question 1103102</A>: <I><SPAN STYLE=\"word-break: break-all;\"> cos sq 4 theta -sin sq 4 theta = -1 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #717799 by </B><A HREF=/tutors/aboutme.mpl?userid=greenestamps><B>greenestamps(13215)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=greenestamps><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=greenestamps><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=717799\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <br><BR>\n" );
document.write( "cos^2(x)-sin^2(x) is the formula for cos(2x).  So your equation<br><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=cos%284x%29%5E2-sin%284x%29%5E2+=+-1 ALIGN=MIDDLE  ALT=\"cos%284x%29%5E2-sin%284x%29%5E2+=+-1\"   DISABLED_style= \"max-width:90%; height:auto;\" ><br><BR>\n" );
document.write( "is equivalent to<br><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=cos%288x%29+=+-1 ALIGN=MIDDLE  ALT=\"cos%288x%29+=+-1\"   DISABLED_style= \"max-width:90%; height:auto;\" ><br><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=8x+=+%28pi%29%2B2k%2Api ALIGN=MIDDLE  ALT=\"8x+=+%28pi%29%2B2k%2Api\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x+=+%28pi%29%2F8+%2B+%282k%2F8%29%2Api ALIGN=MIDDLE  ALT=\"x+=+%28pi%29%2F8+%2B+%282k%2F8%29%2Api\"   DISABLED_style= \"max-width:90%; height:auto;\" > </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );