# Find the angle (Theta) between the two vectors using Vector Calculus Made Easy for the Ti-Nspire CX CAS

Say we have to.. Find the angle (Theta) between the two vectors U= cos(pi/4)i + sin(pi/4)j V= cos(pi/2)i + sin(pi/2)j When entering these 2 vectors using option 1 6 in Vector Calculus Made Easy we will not use the i-j notation and instead use vector /matrix notation as shown in this image . The… (read more)