The acceleration of piston of a reciprocating engine is: (a) (omega^{2} rleft[sin theta+frac{cos 2 theta}{n} ight]) (b)

The acceleration of piston of a reciprocating engine is:

(a) \(\omega^{2} r\left[\sin \theta+\frac{\cos 2 \theta}{n}\right]\)

(b) \(\omega^{2} r\left[\cos \theta+\frac{\cos 2 \theta}{n}\right]\)

(c) \(\omega^{2} r\left[\sin \theta+\frac{\sin 2 \theta}{n}\right]\)

(d) \(\omega^{2} r\left[\cos \theta+\frac{\sin 2 \theta}{n}\right]\)