Find the Domain f(x) equals sec(two x)

Find the Domain f(x)=sec(2x)
Set the argument in equal to to find where the expression is undefined.
, for any integer
First, divide each term by and simplify.
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Divide each term in by .
The common factor should be canceled of .
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Cancel the common factor.
Divide by .
First, multiply .
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Multiply and .
First, multiply by .
The domain is all values of that make the expression defined.
Set-Builder Notation:
, for any integer
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