document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=43952>Question 43952</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A flagpole 4 m tall stands on a sloping roof. A siupport wire 5 m long joins the top of the pole to a point on the roof 6 m up from the bottom of the pole. At what angle is the roof inclined to the horizontal? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #28889 by </B><A HREF=/tutors/aboutme.mpl?userid=Paul><B>Paul(988)</B></A><img src=\"/images/stars/stars-11.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Paul><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=28889\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> From law of cosine:<BR>\n" );
document.write( "Let x be the unknown angle<BR>\n" );
document.write( "EQUATION:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=5%5E2=4%5E2%2B6%5E2-2%284%29%286%29cos%28x%29 ALIGN=MIDDLE  ALT=\"5%5E2=4%5E2%2B6%5E2-2%284%29%286%29cos%28x%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "25=52-48cos(x)<BR>\n" );
document.write( "-25=-48cos(x)<BR>\n" );
document.write( "x=55.8<BR>\n" );
document.write( "Hence, the anlge is 55.8 degrees<BR>\n" );
document.write( "PAul. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );