anonymous
  • anonymous
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 read-out?
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga. Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus. Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.
schrodinger
  • schrodinger
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anonymous
  • anonymous
f(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
  • anonymous
f(x) = A cos (Bx + C) + D A = amplitude = ½|max - min| B = (2π)/period C = phase shift = 0 for this problem D = vertical shift = max - amplitude
anonymous
  • anonymous
A and D are wrong right?

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anonymous
  • anonymous
yes
anonymous
  • anonymous
i think its C
anonymous
  • anonymous
The coefficient of x is 2pi/period, so it should be \[2 \pi \div \frac{ \pi }{ 2 }\]
anonymous
  • anonymous
oh so its 4
anonymous
  • anonymous
so 4x
anonymous
  • anonymous
yep
anonymous
  • anonymous
i see now its B thank you very much
anonymous
  • anonymous
you're welcome

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