Question

The graph of f (0) = -4 cos 0 is shown below. The range of this function is

-4 ≤ f (0) ≤ 0

-π ≤ f (0) ≤ 2π

0 ≤ f (0) ≤ 2π

-4 ≤ f (0) ≤ 4

Answer 1

-4 ≤ f (
`\theta`) ≤ 4

Explanation:

The range of a function is the allowed y-values of the function.

We can simply look at the periodic function below and see that the y-value ranges from a negative 4 to a positive 4. It oscillates betwen -4 and 4. That is the range.

We can say -4 ≤ f (
`\theta`) ≤ 4

Last answer choice is right.

*** NOTE: it is a type, not "0", rather "
`\theta`"