Solve the Problem $$I ( t ) = 40 \sin \left( 60 \pi t - \frac { \pi } { 2 } \right)$$

Multiple Choice

Solve the problem.
-The function
$$I ( t ) = 40 \sin \left( 60 \pi t - \frac { \pi } { 2 } \right)$$ represents the amperes of current produced by an electric generator as a function of time t, where t is measured in seconds. Find the smallest value of t for which the current is 20 amperes. Round your answer to three decimal
Places, if necessary.

A) 0.008
B) 0.011
C) 0.017
D) 0.033