1.

If cos (x - y) \(=\frac{\sqrt 3}{2}\) and sin (x + y) \(=\frac{1}{2}\), then the value of x (0 ≤ x ≤ 90) is:

A. 45°
B. 30°
C. 15°
D. 60°
Answer» C. 15°


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