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1. $\cos θ + \sin θ = \sqrt{2} \cos θ$

A. $\pm \sqrt{2} \sin θ$
B. $\pm \sqrt{2} \sin θ$
C. $\pm \sqrt{2} \sin θ$
D. $\pm \sqrt{2} \sin θ$

Answer: Option A

Explanation:

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