A and B are two points. А
B
C
D
Shade the region inside
the rectangle, which is closer to AD that DC,
and less that 4cm from D.​

Iwish i knew the answer but i don’t but someone will come and us

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.

The right answer is option d.