APFIVE Trigonometric Expression Simplification
Which of the following is equivalent to the expression $$\frac{\sec^2 x \cdot \cos^2 x - \tan^2 x \cdot \cos^2 x}{\cos^2 x}$$ for all values of $x$ for which the expression is defined?
A
$$1$$
B
$$\cos^2 x$$
C
$$\sin^2 x$$
D
$$\sec^2 x$$
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