Question

What cosine function represents an amplitude of 2, a period of 2π, a horizontal shift of π, and a vertical shift of −1?

f(x) = −1 cos πx + 2

f(x) = −1 cos (x − π) + 2

f(x) = 2 cos (x − π) − 1

f(x) = 2 cos πx − 1

Answer 1

C

Answer 2

acos(x-h)+k

Answer 3

a is amplitude, h is horizontal shift, k is vertical shift... and cos always has a period of 2pi

Answer 4

I agree with C

Answer 5

Thank you! :)