首先,sin(x)是奇函数,因为sin(-x) = - sin(x)
其次, cos(x)是偶函数,因为cos(-x) = cos(x)
综上,f(-x)=cos(sin(-x))=cos(-sin(x))=cos(sin(x))=f(x)
所以f(x)是偶函数,若还有问题可随时提问