Question

How do you find the value of `cot 180`?

Answer 1

Use the notion that `cotx=1/tanx`

To see that `cot(180)` is `color(blue)"undefined"`

Explanation:

`cot(180)` is same as `1/tan(180)`

And `tan180=0`

`=>cot(180)=1/0` which is undefined in `RR`