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JEE Mathematics · Medium

Trigonometry: Specific Value Equation MCQ

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Specific Value EquationMediumQuestion 200024

Question

The general solution of cos θ = 1/2 is:
  1. A
    θ = 2nπ ± π/3
    Correct
  2. B
    θ = nπ ± π/3
  3. C
    θ = nπ + (−1)ⁿ π/3
  4. D
    θ = nπ/3

Correct answer

θ = 2nπ ± π/3

Explanation

General solution of cos θ = cos α is θ = 2nπ ± α. Here α = π/3, so θ = 2nπ ± π/3.

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