Final answer:
To determine the magnitude of the projection of vector f along line AC, use the relationships Ax = Acose and Ay = Asine. Then, use the Pythagorean theorem to find the magnitude of the projection.
Step-by-step explanation:
To determine the magnitude of the projection of vector f along line AC, we can use the relationships Ax = Acose and Ay = Asine. By substituting the given values, we can find the magnitude of the horizontal and vertical components of vector f. Then, we can use the Pythagorean theorem to find the resultant magnitude of the projection.
The magnitude of the projection, A, is given by:
A = sqrt(Ax^2 + Ay^2).