Solve Apps: Trigonometric Equations
-A Generator Produces an Alternating Current $\mathrm { I } = 40 \sin 144 \pi \mathrm { t }$

Multiple Choice

Solve Apps: Trigonometric Equations
-A generator produces an alternating current according to the equation $\mathrm { I } = 40 \sin 144 \pi \mathrm { t }$ , where $t$ is time in seconds and $\mathrm { I }$ is the current in amperes. What is the smallest time $t$ such that $\mathrm { I } = 20$ ?

A) $\frac { 1 } { 864 }$ second
B) $\frac { 1 } { 432 }$ second
C) $\frac { 1 } { 576 }$ second
D) $\frac { 1 } { 288 }$ second