f(x) = If[0 ≤ x ≤ 1, sin((((2 * π) * 894) * x))]
g(x) = If[0 ≤ x ≤ 1, sin((((2 * π) * 1788) * x))]
h(x) = If[0 ≤ x ≤ 1, f(x) + g(x)]
a = 8.900000000000017E-4 (slider from 0 to 0.002, step 1.0E-5)
A: (a, f(a))
B: (a, g(a))
S: (a, g(a) + f(a))