Activity #4 in Differential Equations Solve the following problems or equations in clean sheets of papers. Show complete solutions neatly and legibly and all final answer/s must be boxed. Upload your handwritten solutions in the Google Classroom. 1. Using rectilinear motion as a guide, derive the three equivalent formulas for rotational motion. 2. xy' - y = y cos 3x 3. A cubic curve has zeros 4, -5 and 6. Determine the orthogonal trajectory of this cubic curve at a y intercept of 120. 4. nm' (m-8)(m +9); m = 8