---

s(t) = A cdot sin left(2 cdot %pi cdot f cdot t right)
newline
s(t) = sin left(2 cdot %pi cdot 10^7 cdot t right)
newline
f_d = 4 cdot f = 4 cdot 10^7 ~ "Гц" = 40 ~ "МГц"
newline
%DELTA t = {1} over {f_d} = {1} over {4 cdot 10^7} ~ "с" = 25 ~ "нс"
newline
T = {1} over {f} = 10^{-7} ~ "с" = 100 ~ "нс"
newline
t_n = {n} over {f_d} = {n} over {4 cdot 10^7} ~ "с"
newline
s_n = sin left(2 cdot %pi cdot f cdot t_n right) = sin left({%pi cdot n} over {2} right)