Chapter 7.1, Problem 12QR

sec(t) – cos(t) sin(t) Simplify to a single trig function.

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sec(t) – cos(t) sin(t) Simplify to a single trig function with no fractions.

identify A, B, C, and D for the sine functions in Exercises 67–70 and sketch their graphs.

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Each time your heart beats, your blood pressure first increases and then decreases as the heart rests between beats. The maximum and minimum blood pressures are called the systolic and diastolic pressures, respectively. Your blood pressure reading is written as systolic/diastolic. A reading of 120/80 is considered normal.A certain person's blood pressure is modeled by the function p(t) = 125 + 25 sin(150(pi)t) where p(t) is the pressure in mmHg (millimeters of mercury), at time t measured in minutes. (a) Find the period of p.  min(b) Find the number of heartbeats per minute.  heartbeats per minute