For the function given, state the starting point for a sample period:

Question

ƒ(t) = −100sin (50t − 20)

 

a. (20, 0)

b. (2/5, 100)

c. (30, 0)

d. (2/5, 0)

 

Answer 1

One might assume that a good starting point for a sample period of the sin function would be zero. If this is the case t=2/5, f(t)=0.