The given expression is:
$\frac{\cos x}{\cos x + \sin x \tan x}$
Now, we know that $\tan x = \frac{\sin x}{\cos x}$. So, we can rewrite the expression as:
$\frac{\cos x}{\cos x + \sin x \cdot \frac{\sin x}{\cos x}}$
Now, let's find a common denominator for the
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