Answer:
Step-by-step explanation:
f(x) = A cos ( Bx + C ) + D
A = - 4
B = C = [tex]\frac{\pi }{2}[/tex]
D = - 2
f(x) = 4 cos ( [tex]\frac{\pi }{2}[/tex] x + [tex]\frac{\pi }{2}[/tex] ) - 2
