Q. Maximum efficiency of spiral gears is given as
a. [cos ( θ + Φ) + 1] / [ cos ( θ – Φ) + 1]
b. [cos ( θ + Φ) – 1] / [ cos ( θ – Φ) – 1]
c. [sin ( θ + Φ) – 1] / [ cos ( θ – Φ) – 1]
d. [sin ( θ + Φ) – 1] / [ sin ( θ – Φ) – 1]
No explanation is available for this question!
