document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=971855>Question 971855</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Hello Tutor, I really need your help to answer this question please. \r<BR>\n" );
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document.write( "3. Verify the following identity by using an angle sum identity: cos (2x)  = 1 – 2(sin2 x).  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 #594255 by </B><A HREF=/tutors/aboutme.mpl?userid=anand429><B>anand429(138)</B></A><img src=\"/images/stars/stars-09.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=anand429><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=anand429><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=594255\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> cos(2x) = cos(x+x)<BR>\n" );
document.write( "=cosx*cosx -sinx*sinx<BR>\n" );
document.write( "=<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28cos%5E2%28x%29-sin%5E2%28x%29%29 ALIGN=MIDDLE  ALT=\"%28cos%5E2%28x%29-sin%5E2%28x%29%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "=<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=1-sin%5E2%28x%29-sin%5E2%28x%29 ALIGN=MIDDLE  ALT=\"1-sin%5E2%28x%29-sin%5E2%28x%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "=<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=1-2sin%5E2%28x%29 ALIGN=MIDDLE  ALT=\"1-2sin%5E2%28x%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > </SPAN>\n" );
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