Asked by Katie
Let G be the graph of the parametric equations
x = cos(4t),
y = sin(6t).
What is the length of the smallest interval P such that the graph of these equations for all t E P produces the entire graph G?
(The "E" represents the symbol for "is in" that looks kind of like a rounded E)
x = cos(4t),
y = sin(6t).
What is the length of the smallest interval P such that the graph of these equations for all t E P produces the entire graph G?
(The "E" represents the symbol for "is in" that looks kind of like a rounded E)
Answers
Answered by
Reiny
does this help?
https://www.wolframalpha.com/input/?i=plot+x+%3D++cos(4t),+y+%3D+sin(6t)
https://www.wolframalpha.com/input/?i=plot+x+%3D++cos(4t),+y+%3D+sin(6t)
Answered by
Katie
So would the interval be (-inf, 1] ??
Answered by
Katie
But that wouldn't be the right answer since it's asking for a length.
Answered by
Steve
cos(4t) has period pi/2
sin(6t) has period pi/3
so, you get the entire curve using the interval
[0,pi]
as indicated by the note next to the graph at the suggested URL.
sin(6t) has period pi/3
so, you get the entire curve using the interval
[0,pi]
as indicated by the note next to the graph at the suggested URL.
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