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1. $\cos θ = \frac{1}{2}$

Answer: Option A

Explanation:

\cos θ = \frac{1}{2} \Rightarrow \cos θ = \cos 60^{°} θ = 60^{°} \cos (90^{°} - θ) = \cos (90^{°} - 60^{°}) = \cos 30^{°} = \frac{\sqrt{3}}{2} a n s :

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