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[函数] 左平移为偶函数右平移为奇函数

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isee posted 2021-7-29 22:49 |Read mode
若函数\(f\left( x \right)=\sin \left( \omega x+\frac{\pi}{6} \right)\)($\omega >0$)的图象向左平移$\frac{\pi}{6}$个单位后得到一个偶函数的图象;若$f\left( x \right)$向右平移\(\frac{\pi}{12}\)个单位后得到一个奇函数的图象,则\(\omega \)的值可以是(       )
A.\(6\)        B.$8$        C.$12$        D.$14$

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original poster isee posted 2021-7-29 22:51
回复 1# isee


提示:选D

\(f\left( x \right)=\sin \left( \omega x+\frac{\pi}{6} \right)\) 左平移为偶函数,最终结果只能是`y=\pm \cos\omega x`;同样的,右平移是奇函数最终结果只能是`y=\pm \sin\omega x`

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