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

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

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

domain

f (x) = 2 cos (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

f (x) = 15 - 2 x - x^{2}

f (x) = 3 x^{2} + 12 x + 20

f (x) = \frac{x}{x ^{2} + 3 x + 2}

f (x) = x^{2} + 6 x

(x + 2)^{3}

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