What is the domain of f(x)=cos(2x) ?

The domain of f(x)=cos(2x) is -infinity <x<infinity

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domain of f(x)=cos(2x)

domain

f (x) = cos (2 x)

- \infty < x < \infty

Interval Notation

(- \infty, \infty)

Solution steps

The function has no undefined points nor domain constraints. Therefore, the domain is

- \infty < x < \infty

(- \frac{3}{5}, - \frac{11}{3}), (\frac{11}{2}, \frac{7}{4})

\frac{1 - 5 x}{4 + x}

f (x) = \frac{x ^{2} - x - 2}{- x ^{2} - 4 x - 4}

f (x) = x + 8

What is the domain of f(x)=cos(2x) ?
The domain of f(x)=cos(2x) is -infinity <x<infinity