document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1135197>Question 1135197</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Prove the following identities\r<BR>\n" );
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document.write( "(i) cos2A + cos4A + cos6A + cos12A = 4cos3Acos4Acos5A\r<BR>\n" );
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document.write( "(ii) cos3Acos8A + sin4Asin7A = cosAcos4A </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #752801 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=752801\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> cos2A <BR>\n" );
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document.write( "Is that <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=cos%5E2%28A%29 ALIGN=MIDDLE  ALT=\"cos%5E2%28A%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > ?<BR>\n" );
document.write( "Or cos(2A) ?<BR>\n" );
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document.write( "If you don't have time to make it clear, I don't have time to work it.<BR>\n" );
document.write( " </SPAN>\n" );
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