皮皮学，免费搜题
登录
搜题
【简答题】
已知函数 f(x)= 3 2 sin2x- 1 2 (co s 2 x-si n 2 x)-1 （1）求函数f（x）的最小值和最周期； （2）设△ABC的内角A、B、C、的对边分别为a、b、c，且c= 3 ，f（C）=0，若向量 m =(1， sinA) 与向量 n =(2，sinB) 共线，求a，b．
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
.
..
皮皮学刷刷变学霸
举一反三
【单选题】下列不属于客房低值易耗品的是( )。
A.
牙具
B.
肥皂
C.
拖鞋
D.
小方巾
查看完整题目与答案
【判断题】It is helpful for the appliers to list out their work or internship experience one by one according to the chronological order.
A.
正确
B.
错误
查看完整题目与答案
【单选题】It is helpful for children to form a good habit by asking them to _____ all the toys after they finish playing.
A.
put off
B.
put down
C.
put away
D.
put out
查看完整题目与答案
【单选题】Many doctors think it is helpful for night-shift workers ______．
A.
to sleep with a bright light on
B.
to plan sleep patterns carefully
C.
to avoid being disturbed at work
D.
to sleep for a long time after work
查看完整题目与答案
【单选题】一般认为,血液中乙醇浓度在0.05%以下时,对驾驶无影响;血液中乙醇浓度为0.05%-0. 15%时,一般人会不适合驾车;若乙醇浓度超过时( ), 对所有人都会有影响,不适宜驾车。
A.
0.15%
B.
0.1%
C.
0.08%
D.
0.05%
查看完整题目与答案
【单选题】一家商务酒店的租金成本占到营业收入的( )左右,那么这个物业的投资是合理的。
A.
5%
B.
10%
C.
20%
D.
40%
查看完整题目与答案
【单选题】It is helpful for managers to talk with their employees to learn the workplace negativity problems.
A.
Y
B.
N
C.
NG
查看完整题目与答案
【多选题】用纸设计桥需考虑的问题有 。
A.
纸的承受力有什么特点
B.
选择形状和结构
C.
用什么方法增强纸的抗弯曲能力
D.
纸易吸水
查看完整题目与答案
【判断题】It is helpful for you to be familiar with the services, programs or products of the employers.
A.
正确
B.
错误
查看完整题目与答案
【判断题】According to the author, it is helpful for children to improve the pronunciation by singing the rhymes.
A.
正确
B.
错误
查看完整题目与答案
相关题目：
【单选题】下列不属于客房低值易耗品的是( )。
A.
牙具
B.
肥皂
C.
拖鞋
D.
小方巾
查看完整题目与答案
【判断题】It is helpful for the appliers to list out their work or internship experience one by one according to the chronological order.
A.
正确
B.
错误
查看完整题目与答案
【单选题】It is helpful for children to form a good habit by asking them to _____ all the toys after they finish playing.
A.
put off
B.
put down
C.
put away
D.
put out
查看完整题目与答案
【单选题】Many doctors think it is helpful for night-shift workers ______．
A.
to sleep with a bright light on
B.
to plan sleep patterns carefully
C.
to avoid being disturbed at work
D.
to sleep for a long time after work
查看完整题目与答案
【单选题】一般认为,血液中乙醇浓度在0.05%以下时,对驾驶无影响;血液中乙醇浓度为0.05%-0. 15%时,一般人会不适合驾车;若乙醇浓度超过时( ), 对所有人都会有影响,不适宜驾车。
A.
0.15%
B.
0.1%
C.
0.08%
D.
0.05%
查看完整题目与答案
【单选题】一家商务酒店的租金成本占到营业收入的( )左右,那么这个物业的投资是合理的。
A.
5%
B.
10%
C.
20%
D.
40%
查看完整题目与答案
【单选题】It is helpful for managers to talk with their employees to learn the workplace negativity problems.
A.
Y
B.
N
C.
NG
查看完整题目与答案
【多选题】用纸设计桥需考虑的问题有 。
A.
纸的承受力有什么特点
B.
选择形状和结构
C.
用什么方法增强纸的抗弯曲能力
D.
纸易吸水
查看完整题目与答案
【判断题】It is helpful for you to be familiar with the services, programs or products of the employers.
A.
正确
B.
错误
查看完整题目与答案
【判断题】According to the author, it is helpful for children to improve the pronunciation by singing the rhymes.
A.
正确
B.
错误
查看完整题目与答案