题目内容
(本小题满分13分)
已知
，函数
．
（1）求函数
的最小正周期；
（2）求函数的单调
减区间；
（3）当
时，求函数的值域．
已知
，函数．（1）求函数
的最小正周期；（2）求函数
的单调减区间；（3）当
时，求函数的值域．解：
··················································· 
2分
································································· 5分
·············································································· 6分
······················································································· 7分
(1)的最小正周期
···································································· 8分
(2) 由
得
∴的单调减区间为
··············································· 10分
(3)
∵
∴
∴
∴
即的值域为
··············································································· 12分
··················································· 2分································································· 5分·············································································· 6分······················································································· 7分(1)
的最小正周期···································································· 8分(2) 由
得∴
的单调减区间为··············································· 10分(3)
∵
∴
∴
∴
即
的值域为··············································································· 12分略
练习册系列答案
第1卷单元月考期中期末系列答案
相关题目
的值（ ）
,sin
,
).
|=|
|，求角
的值. 
中，角
所对的边分别为
，已知
,
, 且
．\
的大小；
，且
的最小正周期为
，求
上的最大值．
，则
的值为（ ）
中，
，
，
是角
，
，
的对边，且
[
，求
,则
的值为 （ ）
B 
C 
D 
，则f(
)的值为( )
向左平移
个单位，所得曲线的一部分如图所示
，则ω+φ= 