Show that the function defined by `f(x) = | cos x |` is a continuous function.

Explanation

To show that the function \( f(x) = |\cos x| \) is continuous, we can use the property that the composition of continuous functions is also continuous. Here’s a step-by-step solution:

### Step 1: Identify the functions involved
We can express \( f(x) \) as a composition of two functions:
- Let \( h(x) = \cos x \)
- Let \( g(x) = |x| \)

Then, we can write:
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