<PRE><B>Question 872862</B>
If at rest the human heart beats once every second then what is the trigonometric equation for maximum blood pressure is 120mmHg, minimum blood pressure is 80mmHg and t=0 corresponds to the peak of the beat. also sketch the blood pressure over two heart beats.
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Draw the picture.
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average pressure is (120+80)/2 = 100
So amplitude = 120-100 = 20
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vertical shift = 100
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Period = 1 second
So, 1 = (2pi)/b
b = 2pi
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Cosine is maximum at t = 0
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Equation:
y = 20*cos(2pix)+100
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{{{graph(400,400,-2,2,-10,140,20cos(2pi*x)+100)}}}
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Cheers,
Stan H.
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