To define what mean by component of a vector A , let draw the vector in Cartesion coordinate system.
We can represent any vector lying in the xy-plane as the sum of vector parallel to the x-axis and a vector parallel to y-axis. These two vector labeled Ax and Ay. They are called the component vector of vector and their vector sum is equal to A or A=Ax+Ay
We can calculate the component of vector A the if we know its magnitude A and its direction. We’ll describe the direction of a vector by its angle relative to some reference direction.
