Harmonic oscillations: declination
$$x = x_{m}\cdot cos(\omega\cdot t+\phi)$$
x - declination
x_m - maximum declination
ω - angular (cyclic, radian) frequency
t - time
φ - phase
x_m - maximum declination
ω - angular (cyclic, radian) frequency
t - time
φ - phase
Find
It is known that:
= 