Decide Whether Each of These Statements Is True (T) or False

Multiple Choice

Decide whether each of these statements is True (T) or False
An alternating current i varies with time t and its variation is described by the equation i = sin 3141t.
(i) The frequency of the alternating current is 500 Hz.
(ii) The periodic time of the alternating current is 2 ms.

A) (i) T (ii) T
B) (i) T (ii) F
C) (i) F (ii) T
D) (i) F (ii) F