tanx=2/5 and cosx<0
201.8 degrees
tanx = 2/5 and cosx<0
Since the tangent is positive and the cosine is negative, this must be an angle in the 3rd quadrant
To find it, we can use
[180 + arctan(2/5) ]° = [180 + 21.8]° ≈ 201.8°
