已知函数y=sin(wx+a)(0＜a＜π,w＞0）为偶函数,则a=拜托聪明又好心的人解答,thank you very much

已知函数y=sin(wx+a)(0＜a＜π,w＞0）为偶函数,则a=拜托聪明又好心的人解答,thank you very much
已知函数y=sin(wx+a)(0＜a＜π,w＞0）为偶函数,则a=
拜托聪明又好心的人解答,thank you very much

已知函数y=sin(wx+a)(0＜a＜π,w＞0）为偶函数,则a=拜托聪明又好心的人解答,thank you very much
函数f(x)=sin(ωx+a)为偶函数,则
f（x）化简后是余弦函数,于是
∵0＜a＜π
∴a=π/2