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

question 31

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

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