9. [-/2 Points] DETAILS BERRAPCALCS 8.2.009. MY NOTES ASK YOUR TEACHER Find the sine and cosine of the angle 9. sin(9) = cos(9) = 0'? (72. 4x5) 13. [0/1 Points] PREVIOUS ANSWERS BERRAPCALC5 8.2.033. ASKYOURTEACHER An ice cream parlor estimates that the number of ice cream cones that it will sell on day n of the year is S(n) = 600 400 cos( 2"") 365 Find the number of ice cream cones that will be sold on August 1 (day 213). (Round your answer to the nearest integer.) X cones 1000 /'\ Ice cram sales Submit Answer 1. [-/1 Points] DETAILS BERRAPCALC5 8.3.003. MY NOTES ASK YOUR TEACHER Differentiate the function. f(t) = 2sin(t)5. [0/2 Points] DETAILS PREVIOUS ANSWERS BERRAPCALC5 8.3.017. MY NOTES ASK YOUR TEACHER (a) Differentiate f(t) = sin(8x - t). f '(t) = -COS X (b) Find f '8. [0/1 Points] DETAILS PREVIOUS ANSWERS BERRAPCALCS 8.3.033.M|. Differentiate the function. "1) = (332 + cos(z) 3e32 sin(z) X Need Help? -' 9. [0/2 Points] DETAILS PREVIOUS ANSWERS BERRAPCALCS 8.3.037. Differentiate the function. (a) f(z) = |n(cos(z)) 1' '(Z) = sin(z) 0052(2) MY NOTES ASK YOUR TEACHER MY NOTES ASK YOUR TEACHER 14. [0/1 Points] DETAILS PREVIOUS ANSWERS BERRAPCALCS 8.3.065.M|. MY NOTES ASK YOUR TEACHER Find the second derivative of the function. f(z) = 42 sin 42 + cos 4z f"(z) = 64zsin4z 4cos4z x Need Help? _' 15. [0/1 Points] DETAILS PREVIOUS ANSWERS BERRAPCALCS 8.3.068. MY NOTES ASK YOUR TEACH ER A manufacturer estimates that the number of air conditioners sold during week I of the year is represented by the equation shown below. S(t) = 900 500 cos 26 Find the rate of change of sales at t = 19 (mid-May). (Round your answer to the nearest whole number.) 5 '(19) = 301 X air conditioners per week