Set the argument in equal to to find where the expression is undefined.

, for any integer

Multiply both sides of the equation by .

Simplify both sides of the equation.

Cancel the common factor of .

Cancel the common factor.

Rewrite the expression.

Simplify .

Apply the distributive property.

Cancel the common factor of .

Factor out of .

Cancel the common factor.

Rewrite the expression.

Reorder and .

The domain is all values of that make the expression defined.

Set-Builder Notation:

, for any integer

Find the Domain y=tan(x/8)