To get a better look at the graph you can click on it he cur

To get a better look at the graph, you can click on it. he curve above 1s the graph of a sn soida tunction t goes through the ports and Find a sm so\'da function at matchthe green Praph f needeo you can enter 3 416 as pl n your ans er otherwise use at least 3 decimal der s f(a)

Solution

2pi/b = 10

b = pi/5

( -7.-3 ) and ( 3, -3 )

y = 3 cos ( pi/5 x - c ) + d

d= 0

y = 3cos(pix/5 -c)

It passes through (0,1)

1 = 3cos(-c)

cosc = 1/3

c = cos^-1(1/3) = 1.235

So, y =3cos(pix/5 - 1.235)

= 3cos(0.628x - 1.235)