document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=890660>Question 890660</A>: <I><SPAN STYLE=\"word-break: break-all;\">  Verify the following identity by using an angle sum identity:<BR>\n" );
document.write( " cos(2x)  = 1 – 2(sin^2x).  Hint (2x = x + x) </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #539129 by </B><A HREF=/tutors/aboutme.mpl?userid=Alan3354><B>Alan3354(69443)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Alan3354><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=Alan3354><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=539129\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\">  Verify the following identity by using an angle sum identity:<BR>\n" );
document.write( " cos(2x)  = 1 – 2(sin^2x).  Hint (2x = x + x)<BR>\n" );
document.write( "----------<BR>\n" );
document.write( "Wow, helpful hint.<BR>\n" );
document.write( "-----<BR>\n" );
document.write( "cos(A + B) = cos(A)cos(B) - sin(A)sin(B) </SPAN>\n" );
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