Answer:
I think D. because it would be more than 0.5
This follows directly from the double angle identity for cosine and the Pythagorean identity:

So we have

Y= 4(sin(3x)-cos(2x))
y = 5sin(x-1)
Enter the equation in which you got the decimal into your TI-84 calculator. Then press the math button. After, select Frac, which stands for fraction. Then press “enter” twice.