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3/2, 1/2, 4., 1., 1/2112, 1/2, 1/2, REDMI NOTE 7S, AI DUAL CAMERA, 2021/12/23 20:44, 39. cos (2x) + 2 cos V1-4x2, Differentiation, 1+x², DC-85, 29. Cosec1, 30. sec, 2x, 1., 31. sin-, 1+ x, 34. tan, 33. coS, Va?-x, 35. sin (2axV1-a²x?), V1 +a?x2-, 36. tan, -1, sin, Vat + at, 38. tan, e2x-1, (2x) + 2 cos V1 -4x2, -39. cos, 40. tan, 1+ax, tan-1, 1+x2, x-, 42. tan, Xト+ Uト, 3-2x, 1- Vax, 43. tan, -1, 45. tan, 44. tan, 1-6x2, 1+15x2, -1, |, 9-xx, 46. If y = tan, prove that, %3D, hp, 1., 1+ x, (1-x², -1, 47. If y = sin, +sec, 4., dx (1+x²), 1+x2, show that, %3D, x+1, -1, 48. If y = sec, |, +sin-1, show that, %3D, x+1, 3D0., xp, |, 49. If y = sin 2 tan,, show that, %3D, hp, X-, x +, xp, V1- x2, V1 +x - V1-x, hp, dx 2V1-x, -1, 50. If y = tan, prove that, 1., %3D, [CBSE 2003], X -, 2*+1, -1, 1. Differentiate sin, w.r.t. x., 1+ 4*, ANSWERS (EXERCISE 2D), 2., 3., 5. 1 6. 1, 7., 8. 2, 1., 9. 2 10. 2, 11.2, -1, 12. -2 13., 14., -1, S0, V1-x², 2 V1-x, -1, 15.-, 3, 16., 17., 2., 18., 2 v1-x², V1-x², V1 -x, V1-x²