For which function is f(f(f(f(f(x)))))≠0?f(f(f(f(f(x)))))\ne0?f(f(f(f(f(x)))))=0? Af(x)=sinxf(x)=\sin xf(x)=sinxBf(x)=x7f(x)=x^7f(x)=x7Cf(x)=ex−1f(x)=e^x-1f(x)=ex−1Df(x)=cos2xf(x)=\cos^2xf(x)=cos2x