24 Part I: The Questions
151.
(A) f
 
(x) = 2 cos(2x) + 1
(B) f
 
(x) = –2 cos(2x) + 2
(C) f
 
(x) = 2 cos(2x)
(D) f x
x
( )
cos
= −
( )
2
1
2
(E) f
 
(x) = 2 cos(πx)
150.
(A) f
 
(x) = 2 cos(x)
(B) f
 
(x) = 2 cos(2x)
(C) f
 
(x) = 2 cos(πx)
(D) f
 
(x) = –2 cos(2x)
(E) f x
x
( )
cos
=
( )
2
2
π