9514 1404 393
Answer:
- arctan(1/4)
- arctan(1/4) -π
Step-by-step explanation:
The inverse tangent of 1/4 is an irrational number, only expressible exactly as ...
arctan(1/4)
This is a first-quadrant angle. There is a matching third-quadrant angle with the same tangent:
arctan(1/4) -π
