8. [-/4 Points] DETAILS MY NOTES LARPCALC11 5.4.081. A weight is attached to a spring suspended vertically from a ceiling. When a driving force is applied to the system, the weight moves vertically from its equilibrium position, and this motion is mode - sin(8t) + - cos(8t), where y is the displacement ( in feet) from equilibrium of the weight and t is the time ( in seconds). (a) Use the identity a sin(BB) + b cos(BB) - Va2 + b2 sin(Be + C), where C = arctan( ) and a 2 0, to write the model in the form y - \\ a2 + b2 sin(Bt + C). (Round C to four decimal places.) (b) Find the amplitude of the oscillations of the weight (in ft). (c) Find the frequency of the oscillations of the weight (in cycles per second). cycles per second Need Help? Read It Watch It Submit Answer 9. [ /4 Points] DETAILS MY NOTES LARPCALC11 5.5.017. Use a double-angle formula to rewrite the expression. 9 - 18 sin2x Need Help? Read It Submit