In a reciprocating steam engine, when the crank has turned from inner dead centre through an angle θ, the angular velocity of the connecting rod is given by
A. ω sinθ/(n² - sin²θ)1/2
B. ω cosθ/(n² - cos²θ)1/2
C. ω sinθ/(n² - cos²θ)1/2
D. ω cosθ/(n² - sin²θ)1/2