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anonymous
 one year ago
Bruce had an EKG to measure his heartbeat rate. After conversion, the function produced could be modeled by a cosine function, and the wave produced a maximum of 4, minimum of −2, and period of pi over 2. Which of the following functions could represent Bruce's EKG readout?
anonymous
 one year ago
Bruce had an EKG to measure his heartbeat rate. After conversion, the function produced could be modeled by a cosine function, and the wave produced a maximum of 4, minimum of −2, and period of pi over 2. Which of the following functions could represent Bruce's EKG readout?

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anonymous
 one year ago
Best ResponseYou've already chosen the best response.1f(x) = 4 cos pi over 2x − 2 f(x) = 3 cos 4x + 1 f(x) = 3 cos pi over 2x + 1 f(x) = 4 cos 4x − 2

anonymous
 one year ago
Best ResponseYou've already chosen the best response.1f(x) = A cos (Bx + C) + D A = amplitude = ½max  min B = (2π)/period C = phase shift = 0 for this problem D = vertical shift = max  amplitude

anonymous
 one year ago
Best ResponseYou've already chosen the best response.1A and D are wrong right?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.1The coefficient of x is 2pi/period, so it should be \[2 \pi \div \frac{ \pi }{ 2 }\]

anonymous
 one year ago
Best ResponseYou've already chosen the best response.1i see now its B thank you very much
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