The function P 100 20 cos 5pi t3 approximates the blood pr

The function P = 100 - 20 cos 5pi t/3 approximates the blood pressure P (in millimeters of mercury) at time t (in seconds) for a person at rest, Find the period of the function, Find the number of heartbeats per minute

Solution

P = 100 -50cos(5pit/3)

a) Period : 2pi/ (5pi/3)

= 2pi*3/5pi

= 6/5 = 1.2 sec

b) No. of hearbeats per minute

2 beats in 1.2 sec

so, 1 min =60 sec, no. of beats = (1.2/2)*60 =36 beats per min