Originally Posted by

**HallsofIvy** Where did you get the "58.8" from? It looks like you are calculating the "x" (east west) and "y" (north south) components separately. But the middle leg, 12.7 km, is "due south". There is no "east west" movement. Also, the third leg, at "61.3° west of south", since it is "west of south" should be -21.5 sin(61.3) For the "north south" movement, the middle leg is 12.7 km and the third leg 21.5 cos(61.3).

You should have, for "x", 18.5 cos31.2 + 0 - 21.5 sin 61.3 (which is negative, so to the west) and, for "y", 18.5 sin(31.2)+ 12.7+ 21.5 cos(61.3) to the south.