Find the derivative. s t cost-9t sint -9 cost (ds/dt) O (ds/dt) O (ds/dt) ds/dt) (dr/d0) Find the derivative. (dr/d9) r-14-80 cos e (dr/d0) (dr/de) (ds/dt) (ds/dt) L t sint+ 3t cost-9t cost-18 sin t -t sin t-3t cost +9t cost W. -t sint+ 3t cost-9t cost 80 (ds/dt) (ds/dt) 3t sin t-9 cost+9 sint Find the derivative. 80 in 8 s=t'tan t- square root of (t) -ae7 sin 0-8 cos 8 -887 cos 9 6 sin 80' cos 9+ sin sect tant + 5t tant sect+ St tant- -54 sect- 1/2square root of (t) 11/2square root of (t (1/2square root of (t) --t sect5t tant+ (1/2square root of (t)))