document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1189731>Question 1189731</A>: <I><SPAN STYLE=\"word-break: break-all;\"> While standing on a 75m tall bridge, given can see two boats. From his position on the bridge, the first boat is located on a bearing of 70 degrees and the second boat is located on a bearing of 300 degrees. Gavin estimates that the angles of depression for each of the boats are 38 degrees and 47 degrees respectively. How far apart are the boats?\r<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 #821232 by </B><A HREF=/tutors/aboutme.mpl?userid=greenestamps><B>greenestamps(13200)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=greenestamps><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=greenestamps><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=821232\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <br><BR>\n" );
document.write( "The answer from @math_tutor2020 is correct; it uses the law of cosines on a triangle with its sides on the surface of the water, which is correct.<br><BR>\n" );
document.write( "The answer from the other tutor forms a triangle using the distance between the boats and the line-of-sight distances from the observer (75m above the water) to the two boats; but the given bearings are measured at the surface of the water -- not from the observer.<br><BR>\n" );
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