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Trigonometric Identity Simplification

Mark

Which of the following is equivalent to the expression $\frac{\tan^2 x \cdot \cos^2 x + \cos^2 x}{\sin^2 x}$ ?

A

$\csc^2 x$

B

$\tan^2 x$

C

$\cot^2 x$

D

$\sec^2 x$

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