Q. The number of points on the line $3x + 4y = 5$, which are at a distance of $\sec^{2}\ \theta + 2{cossec}^{2}\ \theta,\ \theta \in R$, from the point (1, 3) is

A) 1
B) 2
C) 3
D) Infinite
Explanation

(b)
The perpendicular distance of (1, 3) from the line $3x + 4y = 5$ is 2 units while,
$\sec^{2}\ \theta + 2\ {cosec}^{2}\theta \geq 3$ [as $\sec^{2}\theta,\ {cosec}^{2}\theta \geq 1\rbrack$
So, there will be two such points on the line

Dr. Abubacker
Reviewed by Dr. Abubacker

Physics Educator & NEET/JEE Specialist

Ph.D. in Physics with 19+ years of teaching experience.