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anonymous
 one year ago
Find the period of the function.
y = 3 cos x
anonymous
 one year ago
Find the period of the function. y = 3 cos x

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anonymous
 one year ago
Best ResponseYou've already chosen the best response.0The period of cosine function is 2π. That doesn't change unless the variable is multiplied by a number. For example if you had y = 3 cos (2x) or y = 3 cos (½x). In those cases the period is 2π divided by the coefficient of x.  For y = 3 cos (2x) the period is 2π ÷ 2 = π.  For y = 3 cos (½x) the period is (2π ÷ ½) = 4π

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1restating what peachpi said the general cosine function is y = A*cos(Bx  C) + D where A is the amplitude T = 2pi/B is the period C/B is the phase shift. Positive means right, negative means left y = D is the midline

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0but there is only cos x so would the period still be 2pi then

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0oh okay thank both of your explanations helped i wrote them down

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1In your case, B = 1 making the period T = 2pi/B = 2pi/1 = 2pi
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