Answer with explanation:
The meaning of the word Domain for a function, y=f(x),is set of all possible values of x for which y, is defined.
The given function is:
y = tan x
x∈(-∞, ∞) that is , x ∈ R,except at those points,where, cos x =0
⇒Cos x=0
Domain of tan x ,is
All Real Numbers except at
=R - {
}