A man walks 10m towards a lamp post and notices that the angle of elevation of the top of the post increases
from 30º to 45º. The height of the lamp post is
Language is remarkable, except under the extreme constraints of mathematics and logic, it never can talk only about what it's supposed to talk about but is always spreading around.
Raju Sharma
Calculus is the most powerful weapon of thought yet devised by the wit of man.