In Problems 33-40, apply the Chain Rule more than once to find the indicated derivative. 33. D.[sin (x+ 3x)] 35. D.[sin (cost)] 37. D[cos (sin )] d dx 39. (sin[cos(sin 2x)]} 34. D.[cos(4r - 19)] 36. D.[cos(+1)] 38. D.[x sin (2x)] 40. dt {cos[cos (cos 1)]}