document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1020016>Question 1020016</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The height h, of a dock above sea level is given by   h=6+4cos(15p), 0<p<6. Find:<BR>\n" );
document.write( "a) the value of h when p=4<BR>\n" );
document.write( "b) thw value of p when h=9<BR>\n" );
document.write( "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 #635982 by </B><A HREF=/tutors/aboutme.mpl?userid=Cromlix><B>Cromlix(4381)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Cromlix><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=Cromlix><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=635982\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Hi there,<BR>\n" );
document.write( "h = 6 + 4cos(15p)<BR>\n" );
document.write( "The value of when p = 4<BR>\n" );
document.write( "h = 6 + 4cos(15 x 4)<BR>\n" );
document.write( "h = 6 + 4cos(60)<BR>\n" );
document.write( "Cos60 = 0.5<BR>\n" );
document.write( "h = 6 + 4 x 0.5<BR>\n" );
document.write( "h = 8 units<BR>\n" );
document.write( "The value of p when h = 9<BR>\n" );
document.write( "6 + 4cos(15p) = 9<BR>\n" );
document.write( "4cos(15p) = 9/6<BR>\n" );
document.write( "cos(15p) = 9/(6 x 4)<BR>\n" );
document.write( "cos(15p) = 9/24<BR>\n" );
document.write( "cos(15p) = 0.375<BR>\n" );
document.write( "(Using cos^-1 = 0.375)<BR>\n" );
document.write( "15p = 67.98 <BR>\n" );
document.write( "p = 67.98/15<BR>\n" );
document.write( "p = 4.53 (2 decimal places)<BR>\n" );
document.write( "Hope this helps :-) </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );