document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=981304>Question 981304</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Using techniques with sum and difference formulas, find any acceptable formula for cos 3(theta) You do not have to fully simplify your answer, but you must at least simplify identities.\r<BR>\n" );
document.write( "\n" );
document.write( "Someone please help me. Thank you.  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #602357 by </B><A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><B>josgarithmetic(39617)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><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/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=602357\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=cos%283%2Atheta%29=cos%28theta%2B2theta%29 ALIGN=MIDDLE  ALT=\"cos%283%2Atheta%29=cos%28theta%2B2theta%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=cos%28theta%29cos%282theta%29-sin%28theta%29sin%282theta%29 ALIGN=MIDDLE  ALT=\"cos%28theta%29cos%282theta%29-sin%28theta%29sin%282theta%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=cos%28theta%29%28cos%5E2%28theta%29-sin%5E2%28theta%29%29-sin%28theta%29%282sin%28theta%29cos%28theta%29%29 ALIGN=MIDDLE   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=cos%5E3%28theta%29-cos%28theta%29sin%5E2%28theta%29-2%2Asin%5E2%28theta%29cos%28theta%29 ALIGN=MIDDLE  ALT=\"cos%5E3%28theta%29-cos%28theta%29sin%5E2%28theta%29-2%2Asin%5E2%28theta%29cos%28theta%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "Hard to know at what stage you are finished.\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "Continuing----\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=cos%28theta%29%28cos%5E2%28theta%29-sin%5E2%28theta%29-2%2Asin%5E2%28theta%29%29 ALIGN=MIDDLE  ALT=\"cos%28theta%29%28cos%5E2%28theta%29-sin%5E2%28theta%29-2%2Asin%5E2%28theta%29%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Using the Pythagorean Identity for <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=cos%5E2%28theta%29 ALIGN=MIDDLE  ALT=\"cos%5E2%28theta%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >,<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=cos%28theta%29%281-sin%5E2%28theta%29-sin%5E2%28theta%29-2sin%5E2%28theta%29%29 ALIGN=MIDDLE  ALT=\"cos%28theta%29%281-sin%5E2%28theta%29-sin%5E2%28theta%29-2sin%5E2%28theta%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=highlight_green%28cos%28theta%29%281-4%2Asin%5E2%28theta%29%29%29 ALIGN=MIDDLE  ALT=\"highlight_green%28cos%28theta%29%281-4%2Asin%5E2%28theta%29%29%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >------Most interesting because looks simplest. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );