arctg(6/17) = 19,44 град = 19,44*3,14/180 = 0,34 радиана
arctg(1/2) = 26,565 град = 26,565*3,14/180 = 0,46 радиана.
arctg(6/17) = 19,44 град = 19,44*3,14/180 = 0,34 радиана
arctg(1/2) = 26,565 град = 26,565*3,14/180 = 0,46 радиана.