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高中数学必修 第一册(648题)



函数\(f\left ( {x} \right )=A\sin {\left ( {ωx+φ} \right )}\left ( {ω>0} \right )\)的图象按以下次序变换:每个点的横坐标变为原来的2倍;图象向右平移\(\frac {\pi } {6}\)个单位长度;每个点的纵坐标变为原来的3倍.得到\(y=\sin {x}\)的图象,则\(f\left ( {x} \right )=\)(  )



A.\(\frac {1} {3}\sin {\left ( {x-\frac {\pi } {3}} \right )}\)

B.\(\frac {1} {3}\sin {\left ( {x+\frac {\pi } {3}} \right )}\)

C.\(\frac {1} {3}\sin {\left ( {2x-\frac {\pi } {6}} \right )}\)

D.\(\frac {1} {3}\sin {\left ( {2x+\frac {\pi } {6}} \right )}\)


知识点:第五章 三角函数


参考答案:D

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