已知f(x)=2cos(wx+Ф)+k,恒有f(x+π/3)=f(-x)成立,且f(6/π)=-1,则实数k的值是.已知f(x)=2cos(wx+Ф)+k,恒有f(x+π/3)=f(-x)成立,且f(6/π)=-1,则实数k的值是.A、+1 -1 B、+3 -3 C、-1 3 D、-3 1

已知f(x)=2cos(wx+Ф)+k,恒有f(x+π/3)=f(-x)成立,且f(6/π)=-1,则实数k的值是.已知f(x)=2cos(wx+Ф)+k,恒有f(x+π/3)=f(-x)成立,且f(6/π)=-1,则实数k的值是.A、+1 -1 B、+3 -3 C、-1 3 D、-3 1 f(x)=4cos(wx-π/6)sinwx-cos(2wx+x) 求值域 [非常急]已知函数f(x)=根号3sin(wx+φ)-cos(wx+φ)(0 已知函数f(x)=根号3sin(wx+φ)-cos(wx+φ)(0 求教：已知f(x)=根号3*sin(wx+a)-cos(wx+a) (0 已知函数f(x)=√3sin(wx+φ)-cos(wx+φ)(0 已知函数f(x)=根号3sin(wx+a)-cos(wx+a)(0 已知函数f(x)=根号3sin(wx+φ)-cos(wx+φ)(0 已知函数f(x)=√3 sin( wx+φ)-cos(wx+φ) (0 已知函数f(x)=根号3sin(wx+fai)-cos(wx+fai)(0 已知偶函数f(x)=sin(wx+φ)+cos(wx+φ)(w>0,|φ| 已知函数f(x)=√3 sin( wx+φ)-cos(wx+φ) (0 已知偶函数f(x)=sin(wx+φ)+cos(wx+φ)(w>0,|φ| 已知函数f(x)=√3sin(wx+φ)-cos(wx+φ)(0 f(x)=4cos(wx-π/6)sinwx-cos(2wx+π/3)请化简 已知函数f x=√3sin(wx+φ/2)*cos(wx+φ/2)+sin^2(wx+φ/2)(w>0,0 已知偶函数f(x)=Sin(w×+f)+CoS(wx+f)(w>0,|f| 已知函数f（x）=sin wx-cos wx最小周期为π 求w 若f（a/2）=1/3求sin2a的值