A particle is executing the motion $\mathrm{x}=\mathrm{Acos}(\mathrm{\omega }\mathrm{t}-\mathrm{\theta })$ . The maximum velocity of the particle is 

• A

  $\mathrm{A\omega cos\theta }$

• B

  $\mathrm{A\omega }$

• C

  $\mathrm{A\omega sin\theta }$

• D

  None of these