Question

What is the exact value of `cot (pi/2)`?

Answer 1

`color(blue)(cot (pi/2) = 1 / tan (pi/2) = 1/ oo = 0`

Explanation:

As may be seen from the table above,
`cot (pi/2) = 1 / tan (pi/2)`

But `tan (pi/2) = oo`

Hence `cot (pi/2) = 1 / tan (pi/2) = 1/ oo = 0`