Question: If two tangents drawn from a point $P$ to the parabola $\mathrm{y}^{2}=16(\mathrm{x}-3)$ are at right angles, then the locus of point $\mathrm{P}$ is :
$x+3=0$
$x+1=0$
$x+2=0$
$x+4=0$
Correct Option: , 2
Solution:
Locus is directrix of parabola
$x-3+4=0 \Rightarrow x+1=0$
