What is the domain of f(x)=cos(3x) ?

The domain of f(x)=cos(3x) is -infinity <x<infinity

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domain of f(x)=cos(3x)

domain

f (x) = cos (3 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

(0, - 3), (5, 0)

f (x) = \frac{( x ^{2} - 8 x + 15 )}{x - 5}

f (x) = \frac{1}{x ^{3}}

f (x) = 2 x^{2} + 2 x - 12

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

What is the domain of f(x)=cos(3x) ?
The domain of f(x)=cos(3x) is -infinity <x<infinity