document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=272600>Question 272600</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Two planes leave an airport at the same time. Their speeds are 130 mph and 150 mph, and the angle between their courses is 36 degrees. How far apart are they after 1.5 hours? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #199349 by </B><A HREF=/tutors/aboutme.mpl?userid=Alan3354><B>Alan3354(69443)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Alan3354><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=Alan3354><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=199349\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Two planes leave an airport at the same time. Their speeds are 130 mph and 150 mph, and the angle between their courses is 36 degrees. How far apart are they after 1.5 hours?<BR>\n" );
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document.write( "The distances they've flown are 2 sides of a triangle.<BR>\n" );
document.write( "a = 130*1.5 = 195 miles<BR>\n" );
document.write( "b = 150*1.5 = 225 miles<BR>\n" );
document.write( "The angle between the sides is 36º<BR>\n" );
document.write( "Use the Cosine Law to find the 3rd side:<BR>\n" );
document.write( "c^2 = a^2 + b^2 - 2*a*b*cos(36)<BR>\n" );
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