physics
posted by tabby .
An airplane is 5,000 m above an observer and 2.1 km to the west of them and 1.5 km to the north of you. Determine the angle to the plane in the x – y axis and the total distance to the plane from you. Choose the xaxis east, y axis north, and z axis up.

distance=sqrt(5^2+2.1^2+1.5^2) km
theta=arcsin(5/distanceabove)