Our cycle of normal breathing takes place every 5 seconds. Velocity of air flow, y, measured in liters per second, after x seconds is modeled by : y=0.6sin(2pi/5)x. Velocity of air flow is positive when we inhale.

Question

Within each breathing cycle, when are we inhaling 0.3 liters per second? Round to the nearest tenth of a second.

Answer 1

.3=.6sin(2pi x/5)

solve for x.