engineering mathematics MCQ #266

If sin(θ) = 3/5, then find the value of cos(2θ).

engineering mathematics MCQ #266

  1. Question 1

    Q1. If sin(θ) = 3/5, then find the value of cos(2θ).

    • A) 7/25
    • B) -7/25
    • C) 24/25
    • D) -24/25

    Answer: 7/25

    Explanation: Using the double angle formula, cos(2θ) = 1 - 2sin²(θ) = 1 - 2(3/5)² = 7/25.