Solve Apps: Trigonometric Equations
-The Output Voltage for An $\mathrm { AC }$

question 52

Multiple Choice

Solve Apps: Trigonometric Equations
-The output voltage for an $\mathrm { AC }$ generator is approximated by $\mathrm { v } = 156 \cos \left( 120 \pi \mathrm { t } - \frac { \pi } { 3 } \right)$ . Find the smallest positive value of $t$ for which the output is 125 volts.

• A) \(0.0045\) second
• B) \(0.0035\) second
• C) \(0.0090\) second
• D) \(0.0100\) second