Question 188657
Amplitude = 6 ... you are correct


general form y=a*cos(bx+c)+d


period : T=2pi/b=2pi/1=2pi



Period is 2pi radians or 360 degrees



Domain: All real numbers


Range: [-4,8] or *[Tex \LARGE -4 \le y \le 8]



Graph:


{{{ graph( 500, 500, -10, 10, -10, 10, 6cos(x)+2) }}}