已知函數(shù),求函數(shù)的最小正周期及其單調(diào)區(qū)間.


解:

…………………3分

………………6分

所以函數(shù)的最小正周期是……………8分

當(dāng)時(shí),單調(diào)遞增;

當(dāng)時(shí),單調(diào)遞減;

所以函數(shù)的單調(diào)遞增區(qū)間為;單調(diào)減區(qū)間為…………………12分


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