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) $\frac { 1 } { 50 }$

Question

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) $\frac { 1 } { 50 }$

Quizplus · Accepted Answer

The period of a cosine function of the form $cos(bt)$ is given by $\frac{2\pi}{b}$. Here, $b = 100\pi$, so the period is $\frac{2\pi}{100\pi} = \frac{1}{50}$.

Solve the Problem 50π50 \pi50π C) π50\frac { \pi } { 50 }50π​

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