engineering mathematics MCQ #149

A right triangle has an angle θ such that sin(θ) = 2/3. Find the value of cos(θ).

engineering mathematics MCQ #149

  1. Question 1

    Q1. A right triangle has an angle θ such that sin(θ) = 2/3. Find the value of cos(θ).

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

    Answer: √5/3

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