trig
posted by Anna .
y = cos(4x/3 minus 1)
amplitude?
Period?
Two x  intercepts?
yintercept?
Domain?
Range?
Shift along x?
Shift along y?
Kind of reflection?

amplitude=1 since this is the maximum value of the function.
Period is value of x when:
4x/3 minus 1 = 2pi.
x intercepts are when:
4x/3 minus 1 = pi/2
4x/3 minus 1 = pi+(pi/2)
y intercept is when
4x/3 minus 1 = 0
Domain is minus infinity to plus infinity.
Range is 1 to +1