Find the value of `x` for which function are identical. `f(x)=cosxa n dg(x)=1/(sqrt(1+tan^2x))`

Explanation

To find the value of \( x \) for which the functions \( f(x) = \cos x \) and \( g(x) = \frac{1}{\sqrt{1 + \tan^2 x}} \) are identical, we need to follow these steps:

### Step 1: Understand the Functions
We have two functions:
- \( f(x) = \cos x \)
- \( g(x) = \frac{1}{\sqrt{1 + \tan^2 x}} \)

### Step 2: Simplify \( g(x) \)
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