zainpatel567
zainpatel567 zainpatel567
  • 12-09-2022
  • Mathematics
contestada

(a) Given that is small, use the small angle approximation of cos to show that 4 cos (0) + cos² (20) ≈ 5-60² +40¹ (b) Hence find an approximation of 4 cos (0) + cos² (20) when 0 = 3° (c) Calculate the percentage error in your approximation​

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