Multiple choice

A function is given by f (t) = sin2 t + cos 2t. Which of the following is true?

  1. f has frequency components at 0 and $\dfrac{1}{2\pi}$Hz.
  2. f has frequency components at 0 and $\dfrac{1}{\pi}$Hz.
  3. f has frequency components at $\dfrac{1}{2\pi}$ and $\dfrac{1}{\pi}$Hz.
  4. f has frequency components at $\dfrac{0.1}{2\pi}$ and $\dfrac{1}{\pi}$Hz.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation