Final answer:
The question is concerning finding a parametric equation for a tangent line of a trajectory in 3D space, typically involving the derivative of the trajectory function at a point.
Step-by-step explanation:
The question is asking for the parametric equation of a tangent line in 3D space. When we are given a trajectory equation like y = ax + bx², which represents a parabola, we can compute the tangent line at a given point by first finding the derivative of the function to determine the slope of the tangent. Here, 'a' and 'b' are coefficients, with 'a' equal to tan(0°), implying 'a' is zero, and 'b' is given by 2(v0cos0)². In this case, 'v0' is the initial velocity and '0' is the angle of projection.
In Example 2.9, the analytical computation of a resultant involves three displacement vectors specified by magnitudes and angles. This is a different calculation involving vector addition, not to be confused with finding a tangent line to a parabola.