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9. (cosx - 322x591: x - 1) = 0 Part I: Use the zero product property to set up two equations that will lead to solutions to the original equation. (2 points) Part II: Use a reciprocal identity to express the equation involving secant in terms of sine, cosine, or tangent. (2 points) Part III: Solve each of the two equations in Part | for x, giving all solutions to the equation. (4 points) 10. An object's motion is described by the equation d: 4sin(x:) . The displacement, d, is measured in meters. The time, t, is measured in seconds. Answer the following questions: Part I: What is the object's position at (=0 ? Be sure to include appropriate units. (2 points) Part II: What is the object's maximum displacement from its resting position? Be sure to include appropriate units. (2 points) Part III: How much time is required for one oscillation? Be sure to include appropriate units. (2 points) Part IV: What is the frequency of this motion? Be sure to include appropriate units. (2 points) Part V: What will the height of the object be at t = 1.75 seconds? (4 points)