Question

Am I correct ?
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 <----- Answer
f(x) = 2 cos πx − 1

Answer 1

@uri @welshfella

Answer 2

yes