Q. The length of the tangent drawn to the circle $x^{2} + y^{2} - 2x + 4y - 11 = 0$ from the point (1, 3) is
A) 1
B) 2
C) 3
D) 4
Explanation
(c)
The length of the tangent drawn to the circle $x^{2} + y^{2} - 2x + 4y - 11 = 0$ from the point (1, 3)
$= \sqrt{1^{2} + 3^{2} - 2.1 + 12 - 11} = \sqrt{22 - 13} = 3$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.