A rectangular wooden frame for shaping poured concrete requires a steel cross wire across the diagonal to support it. The rectangular
frame is 10 feet by 5 feet. How long, to the nearest tenth of a foot, must
the cross wire across the diagonal be?

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.