Physics · JEE | OSCILLATIONS

Which of the following functions of time represents a simple harmonic motion?

1. A
   \( \u03sin^3 ωt \)
2. B
   \( \u03sin ωt - \cos ωt \)
3. C
   \( \cos ωt + \cos 3ωt + \cos 5ωt \)
4. D
   \( \exp(-ω^2 t^2) \)