document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=974575>Question 974575</A>: <I><SPAN STYLE=\"word-break: break-all;\"> 4cosx+5cosx=4<BR>\n" );
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document.write( "The answer is: cosx=(4/9), right?\r<BR>\n" );
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document.write( "But, how do you write this in terms of arccos &#952;? Would it be: arcoss(4/9)+2&#960;k, for any integer k, or +/-arcoss(4/9)+2&#960; k, for any integer k, or is there just not a solution?<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #596442 by </B><A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><B>josgarithmetic(39620)</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=596442\">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=4cos%28x%29%2B5cos%28x%29=4 ALIGN=MIDDLE  ALT=\"4cos%28x%29%2B5cos%28x%29=4\"   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=9cos%28x%29=4 ALIGN=MIDDLE  ALT=\"9cos%28x%29=4\"   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=cos%28x%29=4%2F9 ALIGN=MIDDLE  ALT=\"cos%28x%29=4%2F9\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "x is the arc value.<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=4%2F9 ALIGN=MIDDLE  ALT=\"4%2F9\"   DISABLED_style= \"max-width:90%; height:auto;\" > is the cosine.<BR>\n" );
document.write( "x would terminate in quadrant 1 or quadrant 4, because its cosine is positive.  You would need a period of <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2pi ALIGN=MIDDLE  ALT=\"2pi\"   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=x=arcos%284%2F9%29%2B2k%2Api ALIGN=MIDDLE  ALT=\"x=arcos%284%2F9%29%2B2k%2Api\"   DISABLED_style= \"max-width:90%; height:auto;\" >, for any integer k. </SPAN>\n" );
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