Question

Which of the following are equivalent to the function y = 4cos x - 2? Check all that apply.
A. y = -4cos x + 2
B. y = 4sin(x +π/2 ) - 2
C. y = 4sin(x - π/2) - 2
D. y = 4cos(-x) - 2

Answer 1

D

Answer 2

because cos(-x)=cosx
therefore
y=4cosx-2

Answer 3

is that the only one?

Answer 4

yup

Answer 5

thanks!