What is the shortest distance between two points A(3, 0) and B(0, 4)?

Q.

What is the shortest distance between two points A(6, 0) and B(0, 8)?

Q. What is the distance between the points A (c, 0) and B (0, −c)?

Q. Let $A(a\cos \theta ,0),B(0,a\sin \theta )$ be any two points then the distance between two points is

Q. What is the distance between the points $\mathrm{A}\left(\sin \theta -\cos \theta ,0\right)$ and $\mathrm{B}\left(0,\sin \theta +\cos \theta \right)$? [CBSE 2015]

Q. If $AB$ is a distance between two points $A(0,a)$ and $B(0,b)$ then $AB=$__