Question

consider the function y(t)=3os(t)-4
find the period and the amplitude

Answer 1

cos

Answer 2

A Cos[pt]-b

A= amplitude
period= 2pi/p

Answer 3

as per the problem,
2*pi*f = 1
f=1/2*pi
Period = T = 1/f = 2pi

Amplitude : maximum = -1; minimum = -7

Answer 4

what?? these are my option for period
a)2pi
b)4pi
c)2/pi
d)2
e)pi

and for amplitude
a)7pi
b)2pi
c)3pi
d)3
e)-3
f)6

Answer 5

Period is 2pi.

Since this has a cos term amplitude varies periodically. However if the question was
3cos(t-4) then the amplitude is 3.