Question: how to find the zeros of a tangent function?
Answer: To find the roots of the equation, replace y with 0 and solve. 0=tan(x)
Take the inverse tangent of both sides of the equation to extract x from inside the tangent. x=arctan(0)
The exact value of arctan(0) is 0 . x=0.
The tangent function is positive in the first and third quadrants. ... 
Add π and 0 .