Cho tam giác ABC vuông ở A có AB=5;AC=12 a, Tính BC b, Gọi M và N lần lượt là trung điểm AB và AC. CM cắt BN tại G. Tính GA

Period is the time it takes for one “cycle” to complete. in the parent sine function, period is 2*pi since sin(0) = 0, sin(pi/2) = 1, sin(pi) = 0, sin(3pi/2) = -1, and sin(2pi) = 0. at that point, the sequence repeats itself. i’m not sure if your graph is similar to the sine function since you didn’t provide a picture, but you can find the period by looking at a graph.

Idon’t know actually is more difficult

Yep u would so yeah