f(x)=sin(2x+w)是偶函数,则w= .f(x)=cos(0.5x+w),则w=

f(x)=sin(2x+w)是偶函数,则w= .f(x)=cos(0.5x+w),则w=
f(x)=sin(2x+w)是偶函数,则w= .f(x)=cos(0.5x+w),则w=

f(x)=sin(2x+w)是偶函数,则w= .f(x)=cos(0.5x+w),则w=
f(x)=sin(2x+w)是偶函数,则sin(2x+w)=sin(-2x+w)
2x+w+(-2x+w)=2kπ+π(因x是变量,故不可能有2x+w=2kπ+(-2x+w))
那么w=(k+1/2)π,k∈Z.
"f(x)=cos(0.5x+w),则w="是什么?若也是偶（奇）函数,照样做就是.