engineering mathematics MCQ #5581

The expression cos²(x) - sin²(x) simplifies to

engineering mathematics MCQ #5581

  1. Question 1

    Q1. The expression cos²(x) - sin²(x) simplifies to

    • A) cos(2x)
    • B) sin(2x)
    • C) 1
    • D) 0

    Answer: cos(2x)

    Explanation: Using the cosine double-angle identity, the expression simplifies to cos(2x).