arc vector

Figure 2.3.1 2.3. 1: Below image is a part of a curve r(t) r ( t) Red arrows represent unit tangent vectors, T^ T ^, and blue arrows represent unit normal vectors, N^ N ^. Before learning what curvature of a curve is and how to find the value of that curvature, we must first learn about unit tangent vector. asmaul husna 99 vector