document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1034292>Question 1034292</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Simplify the expression by using a double-angle formula.\r<BR>\n" );
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document.write( "cos^2(2 theta)- sin^2(2 theta) </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #648899 by </B><A HREF=/tutors/aboutme.mpl?userid=robertb><B>robertb(5830)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=robertb><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=robertb><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=648899\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> By a direct application of the double-angle identity, <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=cos%5E2%282%2A+theta%29-+sin%5E2%282%2A+theta%29+=+cos%284%2Atheta%29 ALIGN=MIDDLE  ALT=\"cos%5E2%282%2A+theta%29-+sin%5E2%282%2A+theta%29+=+cos%284%2Atheta%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >. </SPAN>\n" );
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