If a function f is periodic with period p, then f(t + p) ---Select--for every t. The trigonometric functions y = sin(x) and y = cos(x) are periodic, with period f(x) f(2x) and amplitude Sketch a graph of y = sin(x) on the interval [0, 2x]. y 1 0-1/ y 1 Sketch a graph of y = cos(x) on the interval [0,2]. 1 y f(p) f(t) x 2 y 1H 1 y X 2 X 2 T 2 -1 y 1