Solve the Problem $50 \pi$ C) $\frac { \pi } { 50 }$

Multiple Choice

Solve the problem.
-The voltage E in an electrical circuit is given by E = 1.3 cos 100πt, where t is time measured in seconds. Find the period.

A) 50
B) $50 \pi$
C) $\frac { \pi } { 50 }$
D) $\frac { 1 } { 50 }$