trig/precalc
posted by mimi .
a plane flies 810 miles form Franklin to Centerville with a bearing of 75 degrees (clockwise from north). then it flies 648 miles from centerville to rosemont with a bearing of 32 degrees. find the straightline distance and bearing from rosemont to franklin.

Compute the north and east displacements of both legs of the journey.
Add the two north displacements. Call that sum Y
Y = 810 cos75 + 648 cos32 = __
Add the two east displacements. Call that sum X.
X = 810 sin75 + 648 sin32 = ___
Straightline distance = sqrt[X^2 + Y^2] 
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