document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=196089>Question 196089</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Three forces acting at a point are in eqilibrium.  These forces are 980 pounds, 760 pounds, and 1220 pounds.  Find the angles between the directions of the forces.\r<BR>\n" );
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document.write( "My trig teacher told me to place all the vectors head to tail to form a triangle and find the angles using the law of consines.  I got the angles 88.1, 38.5, and 126.6 but they add up to 180 not 360 like if the forces were actually pulling.   </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #147003 by </B><A HREF=/tutors/aboutme.mpl?userid=scott8148><B>scott8148(6628)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=scott8148><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=scott8148><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=147003\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> OK -- so far, so good\r<BR>\n" );
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document.write( "picture sliding the TAIL of each vector in a head-to-tail pair from the head of the vector it is touching, to the tail<BR>\n" );
document.write( "keeping each vector pointed in the original direction\r<BR>\n" );
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document.write( "you will end up with all the tails together at the proper angles\r<BR>\n" );
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document.write( "after the displacement, the angles between any tail-to-tail pair should be the SUPPLEMENT of the angle when the pair was head-to-tail </SPAN>\n" );
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