document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1140523>Question 1140523</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Hi can you help me with this problem. Two observers see the same helicopter. Ashley sights the helicopter at a bearing of 44 degrees. The bearing from Ashley to Brent is 77 degrees. They are 21 miles from each other. If Ashley is 15 miles from the helicopter, find the distance between the helicopter and Brent? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #761057 by </B><A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><B>ankor@dixie-net.com(22740)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><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=ankor@dixie-net.com><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=761057\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Two observers see the same helicopter.<BR>\n" );
document.write( " Ashley sights the helicopter at a bearing of 44 degrees.<BR>\n" );
document.write( " The bearing from Ashley to Brent is 77 degrees.<BR>\n" );
document.write( " They are 21 miles from each other.<BR>\n" );
document.write( " If Ashley is 15 miles from the helicopter, find the distance between the helicopter and Brent? <BR>\n" );
document.write( ":<BR>\n" );
document.write( "draw this out, a triangle ABC is formed with the two observers and the helicopter<BR>\n" );
document.write( "find the interior angle at Ashley's position<BR>\n" );
document.write( "A: 77-44 = 33 degrees<BR>\n" );
document.write( "the side opposite 33 degrees is the distance from Brent and the helo = a<BR>\n" );
document.write( "Use the law of cosines. a^2 = b^2 + c^2 - 2bc * cos(a), where<BR>\n" );
document.write( "b = 15, c = 21, A = 33 degrees, <BR>\n" );
document.write( "a^2 = 15^2 + 21^2 - 2(15*21)*Cos(33)<BR>\n" );
document.write( "a^2 = 75 + 441 - (630*.83867)<BR>\n" );
document.write( "a^2 = 666 - 528.3625<BR>\n" );
document.write( "a = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=sqrt%28137.6735%29 ALIGN=MIDDLE  ALT=\"sqrt%28137.6735%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "a = 11.732 mi, Brent to Helo<BR>\n" );
document.write( ":<BR>\n" );
document.write( "Check my math!<BR>\n" );
document.write( " </SPAN>\n" );
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