Help with math please

Question

1. What is the period of the graph of y = 2 sin 3A in degrees?

2. Determine the amplitude and period in radians of each function.

a. y = 1/3 sin 4x

b. y = -2 cos 3x

c. y = ½ cos x/4

d. y = -3.2 sin x/2

3. What is the equation of a cosine function if its amplitude is ¼ and it has a period of pi/3?

please help with these ones

Answer 1

1.  To find the period, take 360 divided by the coefficient of A

360/3

120

2.

a amplitude 1/3.  period pi/4

b. amplitude 2. Period pi/3

c. Amplitude 1/2. period 4pi

d. Amplitude 3.2. period 2pi

3. y=1/4 cos(3x)

_/