document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1170448>Question 1170448</A>: <I><SPAN STYLE=\"word-break: break-all;\"> cos2x+cos4x<BR>\n" );
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document.write( "sin2x-sin4x\r<BR>\n" );
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document.write( "a. cot x<BR>\n" );
document.write( "b.-cot x<BR>\n" );
document.write( "c. sin x<BR>\n" );
document.write( "d.- tan x  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #795333 by </B><A HREF=/tutors/aboutme.mpl?userid=MathLover1><B>MathLover1(20850)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=MathLover1><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=MathLover1><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=795333\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28cos%282x%29%2Bcos%284x%29%29%2F+%28sin%282x%29-sin%284x%29%29 ALIGN=MIDDLE  ALT=\"%28cos%282x%29%2Bcos%284x%29%29%2F+%28sin%282x%29-sin%284x%29%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "use identities:\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=sin%282x%29=+2sin%28x%29cos%28x%29 ALIGN=MIDDLE  ALT=\"sin%282x%29=+2sin%28x%29cos%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=cos%282x%29=cos%5E2%28x%29+-+sin%5E2%28x%29 ALIGN=MIDDLE  ALT=\"cos%282x%29=cos%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=sin%284x%29=4sin%28x%29cos%5E3%28x%29+-+4sin%5E3%28x%29cos%28x%29 ALIGN=MIDDLE  ALT=\"sin%284x%29=4sin%28x%29cos%5E3%28x%29+-+4sin%5E3%28x%29cos%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=cos%284x%29=sin%5E4%28x%29+%2B+cos%5E4%28x%29+-+6sin%5E2%28x%29+cos%5E2%28x%29 ALIGN=MIDDLE  ALT=\"cos%284x%29=sin%5E4%28x%29+%2B+cos%5E4%28x%29+-+6sin%5E2%28x%29+cos%5E2%28x%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28cos%282x%29%2Bcos%284x%29%29%2F+%28sin%282x%29-sin%284x%29%29 ALIGN=MIDDLE  ALT=\"%28cos%282x%29%2Bcos%284x%29%29%2F+%28sin%282x%29-sin%284x%29%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "=<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28cos%5E2%28x%29+-+sin%5E2%28x%29%2Bsin%5E4%28x%29+%2B+cos%5E4%28x%29+-+6sin%5E2%28x%29+cos%5E2%28x%29%29%2F%282sin%28x%29+cos%28x%29-%284sin%28x%29cos%5E3%28x%29+-+4sin%5E3%28x%29cos%28x%29%29%29 ALIGN=MIDDLE   DISABLED_style= \"max-width:90%; height:auto;\" >.............use <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=sin%5E4%28x%29+%2B+cos%5E4%28x%29=2+cos%5E4%28x%29+-+2+cos%5E2%28x%29+%2B+1 ALIGN=MIDDLE  ALT=\"sin%5E4%28x%29+%2B+cos%5E4%28x%29=2+cos%5E4%28x%29+-+2+cos%5E2%28x%29+%2B+1\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "= <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28cos%5E2%28x%29+-+%281-cos%5E2%28x%29%29%2B%282+cos%5E4%28x%29+-+2+cos%5E2%28x%29+%2B+1%29+-+6%281-cos%5E2%28x%29%29+cos%5E2%28x%29%29%2F%282sin%28x%29+cos%28x%29%281-%282cos%5E2%28x%29+-+2sin%5E2%28x%29%29%29%29 ALIGN=MIDDLE   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "= <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%282+cos%5E2%28x%29+%282+cos%282+x%29+-+1%29+%29%2F%282sin%28x%29+cos%28x%29%281-2%28cos%5E2%28x%29+-+sin%5E2%28x%29%29%29%29 ALIGN=MIDDLE   DISABLED_style= \"max-width:90%; height:auto;\" >......use <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=cos%5E2%28x%29+-+sin%5E2%28x%29=cos%282x%29 ALIGN=MIDDLE  ALT=\"cos%5E2%28x%29+-+sin%5E2%28x%29=cos%282x%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "= <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%282+cos%5E2%28x%29+%282+cos%282+x%29+-+1%29+%29%2F%282sin%28x%29+cos%28x%29%281-2cos%282x%29%29%29 ALIGN=MIDDLE   DISABLED_style= \"max-width:90%; height:auto;\" >....simplify\r<BR>\n" );
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document.write( "=<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%282cos%5E2%28x%29+cross%28%282+cos%282+x%29+-+1%29%29%29%2F%282sin%28x%29+cos%28x%29%28-cross%28%282cos%282x%29+-+1%29%29%29%29 ALIGN=MIDDLE   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "=<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28cross%282%29cos%5Ecross%282%29%28x%29+%29%2F%28-cross%282%29sin%28x%29+cross%28cos%28x%29%29%29 ALIGN=MIDDLE   DISABLED_style= \"max-width:90%; height:auto;\" >...simplify\r<BR>\n" );
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document.write( "=<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=cos%28x%29+%2F%28-sin%28x%29+%29 ALIGN=MIDDLE  ALT=\"cos%28x%29+%2F%28-sin%28x%29+%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "= <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-cot%28x%29 ALIGN=MIDDLE  ALT=\"-cot%28x%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );