Question 1062229
Bird to ground directly below, 2 meters;
That point directly below, along the ground, to the birdpath, 4 meters.
Angle below the bird, 90 degree.
Angle from the bird to the nearest point of the birdpath to the point directly below the bird, some angle x.


{{{tan(x)=2/4=1/2}}}


{{{x=arctan(1/2)}}} or {{{x=tan^(-1)(1/2)}}}.




26.6 degrees