Single equation with 2 unknowns

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To solve the equation y = 0.2sin(5x - 1100t) for t when y = 0.1, it's essential to recognize that a single equation with two unknowns cannot be solved directly. The value of x is crucial and may be determined by the context of the problem, such as assuming x = 0. Alternatively, if the problem involves a physical scenario, the x-value could represent a specific point in space, allowing for the selection of x to simplify the calculation. Understanding the wavelength might also provide insights into the relationship between x and y. Ultimately, additional information or assumptions about x are necessary to find t.
KateO
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hiya, if i have the equation:
y=0.2sin(5x-1100t)
and i need what t = when y - 0.1

how do i do this without knowing x / how do i find x?
thanks u
- kait
 
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You can't solve a single equation with 2 unknowns.
The x-value to use is hidden in the wording of the problem scenario ...
... probably the origin , x= 0 .

OR,
they want the time for a piece of string to go from y = .2 (say)
to y = -.01 , which means you get to choose your x - location.
 
would finding the wavelength not help at all? is x the wavelength??
or no...
 

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