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In the given figure, if i 1 = 3 sin ω t and i 2 = 4 cos ω t , then i 3 is

Options

  1. A5 sin ω t + 53 °
  2. B5  sin  ω t + 37 °
  3. C5  sin  ω t + 45 °
  4. D5  cos  ω t + 53 °

Correct answer

A. 5 sin ω t + 53 °

Step-by-step solution

i 3 = i 1 + i 2 ⇒ i 3 = 3 sin ω t + 4 cos ω t ⇒ i 3 = 5 3 5 sin ω t + 4 5 cos ω t ⇒ i 3 = 5 cos 53 ° sin ω t + sin 53 ° cos ω t ⇒ i 3 = 5 sin ω t + 53 °

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