Calculate the gradient vector of f(x,y,z)=excos(y)+z2f(x,y,z) = e^x \cos(y) + z^2f(x,y,z)=excos(y)+z2 at the point (0,0,1)(0, 0, 1)(0,0,1).
⟨1,0,2⟩\langle 1, 0, 2 \rangle⟨1,0,2⟩
⟨1,1,2⟩\langle 1, 1, 2 \rangle⟨1,1,2⟩
⟨0,0,2⟩\langle 0, 0, 2 \rangle⟨0,0,2⟩
⟨1,0,0⟩\langle 1, 0, 0 \rangle⟨1,0,0⟩