APFIVE Trigonometric Expression Simplification
Where both expressions are defined, which of the following is equivalent to $$\frac{\sec^2 x \cdot \cos^2 x - \tan^2 x \cdot \cos^2 x}{\cos^2 x}$$?
A
$$\sin^2 x$$
B
$$1$$
C
$$\sec^2 x$$
D
$$\cos^2 x$$
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