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1.

A. $\sec^{2} θ = 1 + \tan^{2} θ$
B. $\sec^{2} θ = 1 + \tan^{2} θ$
C. $\sec^{2} θ = 1 + \tan^{2} θ$
D. $\sec^{2} θ = 1 + \tan^{2} θ$

Answer: Option A

Explanation:

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