engineering mathematics MCQ #5211

If sin(x) = 1/2, what is cos(2x)?

engineering mathematics MCQ #5211

  1. Question 1

    Q1. If sin(x) = 1/2, what is cos(2x)?

    • A) 1/2
    • B) -1/2
    • C) 1
    • D) 0

    Answer: 1/2

    Explanation: Using cos(2x) = 1 - 2sin²x with sin x = 1/2 gives cos(2x) = 1/2.