The correct steering formula is
where $$\phi $$ and $$\theta $$ = Angle made by outside and inside front wheels respectively with the axle at their extreme positions;
b = Wheel base, and c = Distance between the pivot points of the front axle.

A. $$\cot \phi - \cot \theta = {c \over b}$$

B. $$\cot \theta - \cot \phi = {b \over c}$$

C. $$2\cot \phi = l\cot \theta $$

D. $$2\cot \theta = l\cot \phi $$

Answer: Option A