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

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

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

domain

f (x) = 3 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) = 8 - 5 x^{2}

f (x) = - x^{3} + 12 x - 16

f (x) = \frac{x ^{2} + 3 x - 18}{x - 6}

x^{3} - 3 x^{2}

f (x) = 4 x^{2} - 18 x + 6

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