engineering mathematics MCQ #5554

What is the value of cos(2x) in terms of sin(x)?

engineering mathematics MCQ #5554

  1. Question 1

    Q1. What is the value of cos(2x) in terms of sin(x)?

    • A) 1 - 2 sin²(x)
    • B) 2 sin²(x) - 1
    • C) 1 + 2 sin²(x)
    • D) 2 sin(x) cos(x)

    Answer: 1 - 2 sin²(x)

    Explanation: Using the double angle formula, cos(2x) = 1 - 2 sin²(x), derived from the Pythagorean identity.