Part A: When A = 28°, which equation can be used to find the distance from point A to point B?
A.
3
sin 28°=
х
B.
X Х
sin 28°=
o
C.
3
cOS 28°
280 =
X Х
e
D.
х
cos 28°=
WIX

Period = π

Amplitude = 5

Step-by-step explanation:

Given:

We are given cosine function. we need to calculate period and amplitude of the curve.

Amplitude: Half the distance between the maximum and minimum of the curve. (coefficient of cosine is amplitude)

Amplitude of the given equation: 5

Now we will find the period of the cosine function.

y= cos x , period is 2π

If function is y= cos(ax) then period is 2π/a

For given function a=2

Period = 2π/2 = π

Hence, The period of given function is π and amplitude is 5