题目
若3cosx+根号下3sinx=2根号下3sin(x+φ),φ属于(-2分之π,2分之π),则φ等于
提问时间:2020-11-04
答案
tanφ=√3/3
φ=π/6
φ=π/6
举一反三
已知函数f(x)=x,g(x)=alnx,a∈R.若曲线y=f(x)与曲线y=g(x)相交,且在交点处有相同的切线,求a的值和该切线方程.
我想写一篇关于奥巴马的演讲的文章,写哪一篇好呢?为什么好
奥巴马演讲不用看稿子.为什么中国领导演讲要看?
想找英语初三上学期的首字母填空练习……
英语翻译
最新试题
- 1已知A,B,C三点在同一条直线上,AB等于100l厘米,BC等于35ABE是AC的中点,求BE的长
- 2There is an air conditioner ________ the window.
- 3she would likes……是不是
- 4芳芳以每秒10米的速度沿铁路边步行,长252米的火车从对面而来.从他身边通过用了12秒,列车每秒行多少米?
- 5翻译一下 I pormised to have done him a favor several days ago.
- 6——got out of the car,he was given some flowers
- 7lose faith in maths,what should i do
- 880L的压缩空气气瓶能装多少立方的空气?压力大概15Mpa左右.
- 9as my grandfather gets older,his attitude——(填一个介词)death changes.
- 10葡萄沟课文原文
热门考点
- 1关于“小人文大社会”的话题作文怎么写
- 2沾衣欲湿杏花雨,吹面不寒杨柳风这首诗的思想感情
- 31张桌子6张椅子,2张桌子10张椅子,3张桌子14个椅子,20张桌子几张椅子?
- 4管仲不谢私恩阅读答案
- 5英语翻译
- 6学苑新报数学天地七年级第39期答案A如题
- 7什么是“地表发射率(地表比辐射率)”?它与哪些因素有关?
- 8The dog likes watching Bob ()with his friends.A.playB.plays C.playingD.to play
- 9He lived in Beijing for two years,during when he learn Chinese He won first
- 10Kids will go to school (改为否定句)如题