📢 Too many exams? Don’t know which one suits you best? Book Your Free Expert 👉 call Now!
  • google app store apple app store
    • ✖

      Question

      [(sinx – 2sin 3 x)/(2cos 3 x –

      cosx)] 2  + 1, x ≠45 o , is equal to:
      A coscec² x Correct Answer Incorrect Answer
      B sec²x Correct Answer Incorrect Answer
      C cot²x Correct Answer Incorrect Answer
      D 2tan²x Correct Answer Incorrect Answer

      Solution

      [(sinx – 2sin 3 x)/(2cos 3 x – cosx)] 2  + 1
      = [sinx(1 – 2sin 2 x)/cosx(2cos 2 x – 1)] 2  + 1 = [tanx(cos2x)/(cos2x)] 2  + 1 = tan 2 x + 1
      = sec 2 x

      Practice Next
      More Trigonometry Questions
      ask-question