Question

Find the domain, period, range, and amplitude of the cosine function.

y = -6cos4x

Answer 1

y = asin(bx+c)+k

Answer 2

a is the amplitude, and is always the absolute value of a
period = 2pi/b
phase shift is k

Answer 3

and c is?

Answer 4

C is nothing by itself, -c/b is something else, I believe is the "starting point" of the graph.

Answer 5

okay all real number and period is pi/2 and i know absolute value is amplitude so its 6

Answer 6

so it is d