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3. (5 分) 函数 $f(x)=\sin \left(2 x+\frac{\pi}{3}\right)$ 的最小正周期为（ $)$

Gaokao · Math · previous-year question

  1. A.$4 \pi$
  2. B.$2 \pi$
  3. C.$\pi$correct
  4. D.$\frac{\pi}{2}$

Answer

C. $\pi$

Explanation

解：函数 $\mathrm{f}(\mathrm{x})=\sin \left(2 x+\frac{\pi}{3}\right)$ 的最小正周期为: $\frac{2 \pi}{2}=\pi$. 故选: C.

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