Question
how do i find the amplitude, period, phase shift of y=2 cos(-4t-(-4 pi/3))
Answers
drwls
The amplitude is the number "2" in front of the trig function.
The frequency (f) is obtained by setting the number "4" in front of "t" equal to 2 pi f. Then solve for f. You can ignore the minus sign.
The phase shift is the 4pi/3 in the inner arentheses. It would be negative if there were a + in front of t, but in this case it is positive.
The frequency (f) is obtained by setting the number "4" in front of "t" equal to 2 pi f. Then solve for f. You can ignore the minus sign.
The phase shift is the 4pi/3 in the inner arentheses. It would be negative if there were a + in front of t, but in this case it is positive.