1. $\sqrt{3}\cos A +\sin A=2\left(0<A<\mathrm{\pi }\right)$

• A. $\frac{\mathrm{\pi }}{3}$
• B. $\frac{\mathrm{\pi }}{3}$
• C. $\frac{\mathrm{\pi }}{3}$
• D. $\frac{\mathrm{\pi }}{3}$

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