A ray of light emanating from `(-4, 3)` after reflection from x-axis at `(alpha-0)` is normal to
Channel: Doubtnut
Date: 2020-04-05

A ray of light emanating from `(-4, 3)` after reflection from x-axis at `(alpha-0)` is normal to circle `x^2 +y^2 -10x-2y+25=0`, then `4alpha=`