engineering mathematics MCQ #5220

What is the minimum value of 2cos(x) - 1?

engineering mathematics MCQ #5220

  1. Question 1

    Q1. What is the minimum value of 2cos(x) - 1?

    • A) -3
    • B) -1
    • C) 1
    • D) 3

    Answer: -3

    Explanation: The minimum value of cos(x) is -1, so the minimum value of 2cos(x) - 1 is 2(-1) - 1 = -3.