Kunci Jawaban dan Pembahasan Soal || Buku Calculus 9th Purcell Chapter 1 - 1.4 Number 1 – 24

Pembahasan Soal Buku Calculus 9th Purcell Chapter 1 Section 1.1

CHAPTER 1 LIMITS

SECTION 1.4 Limit Involving Trigonometric Functions


Problem Set 1.4, Number 1 – 24.

Calculus 9th Purcell Chapter 1 - 1.4

    In Problems 1-14, evaluate each limit.
  1. lim
    cos x
    x → 0
    x + 1
  2. PEMBAHASAN:

    Calculus 9th Purcell Chapter 1 - 1.4


  3. lim
    θ cos θ
    θ → π/2
     
  4. PEMBAHASAN:

    Calculus 9th Purcell Chapter 1 - 1.4


  5. lim
    cos2 t
    t → 0
    1 + sin t
  6. PEMBAHASAN:

    Calculus 9th Purcell Chapter 1 - 1.4


  7. lim
    3x tan x
    x → 0
    sin x
  8. PEMBAHASAN:

    Calculus 9th Purcell Chapter 1 - 1.4


  9. lim
    sin x
    x → 0
    2x
  10. PEMBAHASAN:

    Calculus 9th Purcell Chapter 1 - 1.4


  11. lim
    sin 3θ
    θ → 0
    2θ
  12. PEMBAHASAN:

    Calculus 9th Purcell Chapter 1 - 1.4


    Semoga Bermanfaat 😁

  13. lim
    sin 3θ
    θ → 0
    tan θ
  14. PEMBAHASAN:

    Calculus 9th Purcell Chapter 1 - 1.4


  15. lim
    tan 5θ
    θ → 0
    sin 2θ
  16. PEMBAHASAN:

    Calculus 9th Purcell Chapter 1 - 1.4


  17. lim
    cot (πθ) sin θ
    θ → 0
    2 sec θ
  18. PEMBAHASAN:

    Calculus 9th Purcell Chapter 1 - 1.4


  19. lim
    sin2 3t
    t → 0
    2t
  20. PEMBAHASAN:

    Calculus 9th Purcell Chapter 1 - 1.4


  21. lim
    tan2 3t
    t → 0
    2t
  22. PEMBAHASAN:

    Calculus 9th Purcell Chapter 1 - 1.4


  23. lim
    tan 2t
    t → 0
    sin 2t – 1
  24. PEMBAHASAN:

    Calculus 9th Purcell Chapter 1 - 1.4


    Semoga Bermanfaat 😁

  25. lim
    sin 3t + 4t
    t → 0
    t sec t
  26. PEMBAHASAN:

    Calculus 9th Purcell Chapter 1 - 1.4


  27. lim
    sin2 θ
    θ → 0
    θ2
  28. PEMBAHASAN:

    Calculus 9th Purcell Chapter 1 - 1.4


    In Problems 15-19, plot the functions u(x), l(x), and f(x). Then use these graphs along with the Squeeze Theorem to determine limxa f(x).
  29. u(x) = |x|, l(x) = –|x|, f(x) = x sin (1/x)
  30. PEMBAHASAN:

    Calculus 9th Purcell Chapter 1 - 1.4


  31. u(x) = |x|, l(x) = –|x|, f(x) = x sin (1/x2)
  32. PEMBAHASAN:

    Calculus 9th Purcell Chapter 1 - 1.4


  33. u(x) = |x|, l(x) = –|x|, f(x) = (1 – cos2 x)/x
  34. PEMBAHASAN:

    Calculus 9th Purcell Chapter 1 - 1.4


    Semoga Bermanfaat 😁

  35. u(x) = 1, l(x) = 1 – x2, f(x) = cos2 x
  36. PEMBAHASAN:

    Calculus 9th Purcell Chapter 1 - 1.4


  37. u(x) = 2, l(x) = 2 – x2, f(x) = 1 + (sin x)/x
  38. PEMBAHASAN:

    Calculus 9th Purcell Chapter 1 - 1.4


  39. Prove that limtc cos t = cos c using an argument similar to the one used in the proof that limtc sin t = sin c.
  40. PEMBAHASAN:
    The result that limt→0 cos t = 1 was established in the proof of the theorem. Then
    limt→0 cos t
    =
    limh→0 cos (t + h)
     
    =
    limh→0 (cos c cos h – sin c sin h)
     
    =
    limh→0 cos c limh→0 cos h – limh→0 sin c limh→0 sin h
     
    =
    cos c

  41. Prove statements 3 and 4 of Theorem A using Theorem 1.3A.
  42. PEMBAHASAN:

    Calculus 9th Purcell Chapter 1 - 1.4


  43. Prove statements 5 and 6 of Theorem A using Theorem 1.3A.
  44. PEMBAHASAN:

    Calculus 9th Purcell Chapter 1 - 1.4


  45. From area (OBP) ≤ area (sector OAP) ≤ area (OBP) + area (ABPQ) in Figure 4, show that
  46. cos tt/(sin t) ≤ 2 – cos t
    and thus obtain another proof that limx→0+ (sin t)/(t) = 1.

    Calculus 9th Purcell Chapter 1 - 1.4

    PEMBAHASAN:

    Calculus 9th Purcell Chapter 1 - 1.4


  47. In Figure 5, let D be the area of triangle ABP and E the area of the shaded region.

  48. Calculus 9th Purcell Chapter 1 - 1.4
    (a)
    Guess the value of limt → 0 + D/E by looking at the figure.
    (b)
    Find a formula for D/E in terms of t.
    (c)
    Use a calculator to get an accurate estimate of limt→0+ D/E.
    PEMBAHASAN:
    (a)
    Written response
    (b)

    Calculus 9th Purcell Chapter 1 - 1.4

    (c)

    Calculus 9th Purcell Chapter 1 - 1.4


Semoga Bermanfaat 😁

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