Crank effort in a reciprocating engine is (a) (F_{r}left[sin theta+frac{sin 2 theta}{2 n} ight]) (b) (F_{r}left[cos theta+frac{cos

Crank effort in a reciprocating engine is

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

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

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

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