Gaokao Math Practice Question
6. (5 分) 函数 $f(x)=\frac{1}{5} \sin \left(x+\frac{\pi}{3}\right)+\cos \left(x-\frac{\pi}{6}\right)$ 的最大值为 $($ )
- A.$\frac{6}{5}$
- B.1
- C.$\frac{3}{5}$
- D.$\frac{1}{5}$
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