7. If the length of the focal chord $|A B|=8 p$ of the parabola $y^{2}=2 p x$, then the inclination angle of the line $A B$ is
7. $\frac{\pi}{6}$ or $\frac{5}{6} \pi$ Hint: It can be proven that: $|A B|=\frac{2 p}{\sin ^{2} \theta}$, where $\theta$ is the inclination angle of the line $A B$.