Given f(x)=cos(x)f(x) = \cos(x)f(x)=cos(x) and g(x)=arcsin(x)g(x) = \arcsin(x)g(x)=arcsin(x), find the domain of (g∘f)(x)(g \circ f)(x)(g∘f)(x).
[0,π][0, \pi][0,π]
[−1,1][-1, 1][−1,1]
R\mathbb{R}R
[−π/2,π/2][-\pi/2, \pi/2][−π/2,π/2]