[小題體驗(yàn)]
1.(2019·徐州調(diào)研)函數(shù)f(x)=3sin的最小正周期為________.
答案:4π
2.函數(shù)y=-tan+2的定義域?yàn)?/span>________________.
答案:
3.函數(shù)y=sin的圖象的對(duì)稱(chēng)軸是________.
解析:y=sin=cos x,根據(jù)余弦函數(shù)的性質(zhì)可知,y=sin圖象的對(duì)稱(chēng)軸是x=kπ,k∈Z.
答案:x=kπ,k∈Z
4.(2019·蘇州調(diào)研)若函數(shù)f(x)=sin πx,x∈,則f(x)的值域?yàn)?/span>________.
解析:函數(shù)f(x)=sin πx,
∵x∈,∴πx∈,∴≤sin πx≤1.
即f(x)的值域?yàn)?/span>.
答案: