A radar station, located at the origin
of *xy* plane, as shown in (Figure 1),
detects an airplane coming straight at the station from the east.
At first observation (point A), the position of the airplane
relative to the origin is R⃗ A. The position vector R⃗
A has a magnitude of 360 mm and is
located at exactly 40 degrees above the horizon. The airplane
is tracked for another 123 degrees in the vertical east-west plane
for 5.0 s, until it has passed directly over the station and
reached point B. The position of point B relative to the origin
is R⃗ B (the magnitude of R⃗ B is 880 mm).
The contact points are shown in the diagram, where
the *x* axis represents the ground and the
positive *y* direction is upward.

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Given that Magnitude of A   = 360 mm Angle for A  = 40u2070 In vector form  Ra  = A*cos (Theta Theta Theta) i   + A*sin(Theta Theta Theta) j Ra = 360*cos(40) i   + 360 sin(40) j Ra  = 275.77 i + 231.40 j   Magnitude of B  = 880 mm Angle for B  = 40 + 123 = 163u2070 In vector form Rb  = B*cos (Theta ... See the full answer