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If tan θ + sec θ = (x – 2)/(x + 2), then what is the value of cos θ?

(x2 – 1)/(x2 + 1)
(2x2 – 4)/(2x2 + 4)
(x2 – 4)/(x2 + 4)
(x2 – 2)/(x2 + 2)

Correct Answer: (x2 – 4)/(x2 + 4)

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