For how many values of n with 0 <= n <= 100 is the graph of f(x) = sin(2x + n) identical to the graph of g(x) = cos(2x)?

sine(x + pi/2) = cos(x)

In this problem, we can ignore the 2x.

Since the functions have a period of 2pi, n = 2pi*x + pi/2, how many integer x values make n inbetween 0 and 100?

=^._.^=