engineering mathematics MCQ #141

If cos(θ) = 2/3, find sin(θ).

engineering mathematics MCQ #141

  1. Question 1

    Q1. If cos(θ) = 2/3, find sin(θ).

    • A) √5/3
    • B) 1/3
    • C) 2/3
    • D) 1/2

    Answer: √5/3

    Explanation: Using Pythagorean identity, sin²(θ) = 1 - cos²(θ) = 1 - (2/3)² = 5/9, so sin(θ) = √(5/9) = √5/3.