Question

help!
What are the amplitude, period, and phase shift of the given function?
f(t)=2/3cos(4t+3pi)

Answer 1

f(t)=2/3cos(4t+3pi)
standard form
y = Acos(Bt +C) =,A=amplitude, Period=2pi/B, Phase shift=C/B

Answer 2

thanks

Answer 3

anytime :)

Answer 4

@sangya21
Phase shift = -C/B if y = Acos(Bt + C)

Answer 5

sorry for missing sign

Answer 6

just look at my beautiful form

Answer 7

@dan815 Are you sure S is the shift?

In y = Acos(Bt + C), Bt + C = 0 when t = -C/B and that is the phase shift.

In y = Acos(2pi/P * x - S), 2pi/P * x - S = 0 when x = SP/(2pi) and that should be the phase shift.

Answer 8

yes ofc

Answer 9

what u said is samething p/2pi = 1/B, and usually we think of right as positive so its -S

Answer 10

@aum except my form is nice because it has A and P and S in the equation itself looks naaiice right

Answer 11

oh isee what u are saying okay

Answer 12

lemme rearrange in shift form