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1. $\cos θ = \frac{1}{2} (a + \frac{1}{a})$ ,

A. $a^{2} + \frac{1}{a^{2}}$
B. $a^{2} + \frac{1}{a^{2}}$
C. $a^{2} + \frac{1}{a^{2}}$
D. $a^{2} + \frac{1}{a^{2}}$

Answer: Option B

Explanation:

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