Easy MCQ +4 / -1

If cos x = 1/2 and x is in [0, 2π], then x =

  1. A π/3, 5π/3 Correct answer
  2. B π/3, 2π/3
  3. C 2π/3, 4π/3
  4. D π/6, 5π/6

Solution

cos x = 1/2 → x = ± π/3 + 2nπ. In [0, 2π]: x = π/3 and x = 2π - π/3 = 5π/3.

About this question

Subject: Mathematics · Chapter: Trigonometric Functions · Topic: Trigonometric Equations

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