若f(x)=asin(x+π/4)+bsin(x-π/4)(ab≠0)是偶函数,则a、b满足的关系式?

问题描述:

若f(x)=asin(x+π/4)+bsin(x-π/4)(ab≠0)是偶函数,则a、b满足的关系式?