We know that Bloch sphere is a good way to represent a qubit(two energy quantum systems). Now I want to know the tangent vector in Bloch sphere, e.g. for states 12(1eiφ)\frac{1}{\sqrt{2}}\left( \begin{array}{c} 1\\ e^{i\varphi}\\ \end{array} \right) , or equivalently with x,y,zx,y,z coordinate: (cosφsinφ0)\left( \begin{array}{c} \cos\varphi\\ \sin\varphi\\ 0\\ \end{array} \right) . We can calculate the tangent vector by φ(cosφsinφ0)=(sinφcosφ0)\partial _{\varphi}\left( \begin{array}{c} \cos\varphi\\ \sin\varphi\\ 0\\ \end{array} \right) =\left( \begin{array}{c} -\sin\varphi\\ \cos\varphi\\ 0\\ \end{array} \right) . My question is, is there a way to calculate a quantity similar to (sinφcosφ0)\left( \begin{array}{c} -\sin\varphi\\ \cos\varphi\\ 0\\ \end{array} \right) without refer to x,y,zx,y,z coordinates? Because I want to see what the tangent vector correspond to nn -qubits instead of single qubit case, in that case, we can't seek help from x,y,zx,y,z coordinates.