What is the domain of f(x)=3cos(2x) ?

The domain of f(x)=3cos(2x) is -infinity <x<infinity

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domain of f(x)=3cos(2x)

domain

f (x) = 3 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

ln (\frac{x}{x ^{2} + 1})

y = \frac{x + 3}{2 x ^{2} - 2}

\frac{5 x - 1}{2 x + 3}

f (x) = \frac{x + 7}{x ^{2} + x - 6}

y = 3 sin (x)

What is the domain of f(x)=3cos(2x) ?
The domain of f(x)=3cos(2x) is -infinity <x<infinity