A particle's displacement is x = A cos(ωt + φ). Which statement is necessarily correct?

Options

• Option A

  A and φ have dimensions of length

• Option B

  ω and φ have dimensions T⁻¹

• Option C

  A has dimension L, ω has T⁻¹, φ is dimensionless

• Option D

  A, ω and φ are all dimensionless