91- 6303239042
Angle Between a Line and the $$y$$-Axis
## Formula
If the line has inclination $$\theta$$ with the $$x$$-axis, its acute angle with the $$y$$-axis is:
$$\frac\pi2-\theta$$
## Usage
- Used when the angle is measured relative to the $$y$$-axis instead of the $$x$$-axis.
