已知函数y=sin½wx在(0,π)是减函数
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&=π/2,w=2.f(x)=sin(2x+π/2)=cos2x,偶函数,关于点M(3π/4,0)对称,且在[0,π/2]上是单调递减函数.
(1)sin(wx+π/6)=sinwxcosπ/6+coswxsinπ/6sin(wx-π/6)=sinwxcosπ/6-coswxsinπ/6f(x)=sin(wx+π/6)+sin(wx-π/6
(1)f(x)=√3sinwxcoswx-cos²wx+1/2=√3/2sin2wx-1/2cos2wx=sin(2wx-π/6)∵图像两相邻对称轴的距离为π/4∴T/2=π/4∴T=π/2
cos(π/2-wx)=sin(wx)所以f(x)=sin^2wx+根号3coswxsin(wx)所以=二分之(根号三加二)乘sin^2wx因为相邻两条对称轴之间的距离为π\2所以w=1)求W的值及f
1.f(x)=根号3sin(wx+a)-cos(wx+a)当a+π/3=kπ时f(x)为偶函数,而0<a<π,则a+π/3=πf(x)=2coswx,而函数y=f(x)图象的两相邻对称轴间
(1)f(x)=根号3sin(wx+φ)-cos(wx+φ)=2Sin(wx+φ-π/6)由于是偶函数,即f(x)=f(-x)即2Sin(wx+φ-π/6)=2Sin(-wx+φ-π/6)即Sinwx
(1)f(x)=根号3sin(wx+φ)-cos(wx+φ)=2Sin(wx+φ-π/6)由于是偶函数,即f(x)=f(-x)即2Sin(wx+φ-π/6)=2Sin(-wx+φ-π/6)即Sinwx
解析:∵f(x)=sin(wx+fai)(w>0,-π≤faiT=5π/2==>w=4/5∴f(x)=sin(4/5x+fai)f(3π/4)=sin(3π/5+fai)=-1==>3π/5+fai=
已知函数f(X)=sin^2wx+根号3sinwx*sin(wx+π/2)+2cos^2wx,x属于R,在y轴右侧的第一个最高点的横坐标为π/6,求w;若将函数f(x)的图像向右平移π/6个单位后,再
它是先得出:pi/2〈=ωx
把(-π/8,2)代入到原方程:2=2sin(-π/4+p)因为|p|
偶函数则x=0是对称轴sin的对称轴是在函数取最值得地方所以sin(0*w+q)=sinq=1或-10
首先得T/2=2π-3π/4=5π/4所以:T=5π/2,即2π/w=5π/2,所以:w=4/5;所以:y=sin(4x/5+A),把点(3π/4,-1)代入,得:-1=sin(-3π/5+A)所以:
f(x)=√3sin(wx+φ/2)*cos(wx+φ/2)+sin^2(wx+φ/2)=(√3/2)sin(2wx+φ)+(1/2)[1-cos(2wx+φ)]=sin(2wx+φ-π/6)+1/2
已知函数f(x)=(√3)sin(ωx+φ)-cos(wx+φ)(0
1:(sinwx)^2+√3sinwxsin(wx+π\2)=(sinwx)^2+√3sinwxcoswx=2[(sinwx)^2+(√3\2)sin2wx]\2=[2(sinwx)^2+√3sin2
因为T=2π/|w|所以w=2又因为sin(3π/2+2Kπ)=-1所以π+y=3π/2+2kπ所以y=π/2+2kπ因为,0
第一题A.第二题B