The period of oscillation of a simple pendulum of length L suspended from the ceiling of a vehicle moves with out friction down in an inclined plane of inclination `alpha` is given by

Options

A. `2pi sqrt((L)/(g cos alpha))`
B. `2pi sqrt((L)/(g sin alpha))`
C. `2pi sqrt((L)/(g))`
D. `2pi sqrt((L)/(g tan alpha))`

Answer

A