question 17-22: find differentiate

17. f(w) = 1 + sec w sin t 1 - sec w 18. 1 + tan t t sin t 19. y = Z 1+t 20. g(z)= sec z + tan z 21. f(0) = 0 cos 0 sin 0 22. f (t) = te' cott 45-60 Find the limit. sin 5x sin x 45. lim 46. ' lim x-0 3x x-0 sin TX sin 3t sin 3x 47. lim 48. lim 1-0 sin t x-0 X sin x - sin x cos x 1 - sec x 49. lim 50. lim x -0 x-0 2x tan 2x sin 0 51. lim 52. lim x-0 X 0-0 tan 70