document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1163472>Question 1163472</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Two points X and Y, 7 metres apart are on the same horizontal ground. The angles of elevation of a point P from X and Y are 50° and 70° respectively. Q is a point on XY produced such that ∠YQP = 90°.<BR>\n" );
document.write( "(i) Illustrate the information in a diagram.<BR>\n" );
document.write( "(ii) Calculate, correct to two decimal places, the length<BR>\n" );
document.write( "(α) XP<BR>\n" );
document.write( "(β) YQ </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #787608 by </B><A HREF=/tutors/aboutme.mpl?userid=ikleyn><B>ikleyn(52781)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ikleyn><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=ikleyn><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=787608\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> .\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "As posted, the problem formulation is &nbsp;INCORRECT &nbsp;or at least confusing.\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "To be correct and clear, &nbsp;it &nbsp;MUST &nbsp;SAY &nbsp;at the very beginning that the points &nbsp;X, &nbsp;Y &nbsp;and &nbsp;Z &nbsp;are in one vertical plane.\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "-------------\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "As a reminder : &nbsp;&nbsp;we live in &nbsp;3D-space.\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "/\/\/\/\/\/\/\/\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "John, &nbsp;before argue with me, &nbsp;PLEASE &nbsp;read my post from the beginning to the end.\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "I said &nbsp;\"in one vertical plane.\"\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "Do you see the difference &nbsp;?\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );