Shan2391
The question states that
f(x) = 3 + 5 sin2xIm sure you can easily rearrange that to make it simpler:
f(x) = 5sin2x + 3
The amplitude is always going to be the number infront the trignometric function...
In this case the amplitude will 5
simple,
if forexample f(x) was 25000sin2x, your amplitude would be 25000
Your amplitude involves the actual trignometric identity... in this case... 2x.
Always remember this rule:
To find the period of any trignometric graph, divide the coefficient of x by 360 (but in this case 2pi as we are dealing with radians) Therefore our period is 180 degrees or simply pi.
Hope that helped