3- A pair of gears, the wheel has a radius of Addendum is [2R cos(B)] and the pinion has a radius of Addendum is [2r cos(B)]. The equation of the Arc of the path contact is........ where is the pressure angle ....... (a) (R-r) [1.73+tan()] (c) (R-r) [1.73- tan()] (b) (R+r) [1.73- tan()] (d) (R+r) [1.73+tan(B)] V=