Question

How do you solve tan x=0?

Answer 1

`x=k*pi` for `k in ZZ`

Explanation:

graph{tan(x) [-5.546, 5.55, -2.773, 2.774]}

From this graph (or trigonometric functions table) you can see, that one solution is `0` and the period of `tan` function is `pi`, so all solutions can be written as: `x=k*pi` for `k in ZZ`