The function f(x) = cot x is discontinuous on the set
We have, 
Now, f(x) is discontinuous where sinx=0.
We know that sinx=0 at x = nπ, n ∈ Z
⇒ f(x) = cotx is discontinuous on the set {x = nπ : n ∈ Z}
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The function f(x) = cot x is discontinuous on the set
We have,
Now, f(x) is discontinuous where sinx=0.
We know that sinx=0 at x = nπ, n ∈ Z
⇒ f(x) = cotx is discontinuous on the set {x = nπ : n ∈ Z}