Let PQ be a focal chord of the parabola $y^2=4x$. The tangents to the parabola at P and Q meet at a point on
y = 2x + 1.

If PQ subtends an angle $\theta$ at the vertex of $y^2=4x$, then $tan\theta$ =

Q. Let $PQ$ be a focal chord of $y^2=4ax$. The tangents to parabola at $P$ and $Q$ meet at a point lying on the line $y=2x+a(a>0)$. If the chord $PQ$ subtends an angle $\theta$ at the vertex of prabola then $\tan \theta =$

Q. Let $PQ$ be a focal chord of the parabola $y^2=4ax$. The tangents to the parabola at $P$ and $Q$ meet at a point lying on the line $y=2x+a,a>0$.
If chord $PQ$ subtends an angle $\theta$ at the vertex of $y^2=4ax$, then tan $\theta$ is equal to

Q. Let PQ be a focal chord of the parabola $y^2=4x$. The tangents to the parabola at P and Q meet at a point on
y = 2x + 1.

Length of chord PQ is

Q. Let $PQ$ be a focal chord of the parabola $y^2=4ax$. The tangents to the parabola at $P$ and $Q$ meet at a point lying on the line $y=2x+a,a>0$.
If chord $PQ$ subtends an angle $\theta$ at the vertex of $y^2=4ax$, then tan $\theta$ is equal to

Q. Let $PQ$ be a focal chord of the parabola $y^2=4ax.$ The tangents to the parabola at $P$ and $Q$ meet at a point lying on the line $y=2x+a,$ $a>0.$ If chord $PQ$ subtends an angle $\theta$ at the vertex of $y^2=4ax,$ then $\tan \theta =$