Solve the Problem $E$ In an Electrical Circuit Is Given By $E = 1.7 \cos 110 \pi t$

Multiple Choice

Solve the problem.
-The voltage $E$ in an electrical circuit is given by $E = 1.7 \cos 110 \pi t$ , where $t$ is time measured in seconds. Find the frequency of the function (that is, find the number of cycles or periods completed in one second) .

A) $\frac { 1 } { 55 }$
B) 55
C) 110
D) $\frac { 1 } { 110 }$