Determine the gradient of the function f(x,y)=sinh(x)cosh(y)f(x,y) = \sinh(x) \cosh(y)f(x,y)=sinh(x)cosh(y) at the origin (0,0)(0,0)(0,0).
⟨1,0⟩\langle 1, 0 \rangle⟨1,0⟩
⟨0,1⟩\langle 0, 1 \rangle⟨0,1⟩
⟨0,0⟩\langle 0, 0 \rangle⟨0,0⟩
⟨1,1⟩\langle 1, 1 \rangle⟨1,1⟩