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Eliminate the parameter x=5sin(t) y =3cos(t).

A) x² + y² = 25
B) x² - y² = 25
C) x² + 3y² = 9
D) x² - 3y² = 9

1 Answer

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Final answer:

To eliminate the parameter, we need to express either x or y in terms of the other variable. From the given equations x = 5sin(t) and y = 3cos(t), we can substitute these expressions and simplify to obtain x² + y² = 34. None of the given options matches this equation.

Step-by-step explanation:

To eliminate the parameter, we need to express either x or y in terms of the other variable. From the given equations, we can solve for x in terms of t: x = 5sin(t). Now we can substitute this expression into the equation y = 3cos(t) to get y in terms of t as well: y = 3cos(t).

Now we have the parametric equations x = 5sin(t) and y = 3cos(t) in terms of t. To eliminate t, we can square both equations and add them together:

x² + y² = (5sin(t))² + (3cos(t))²

Simplifying further, we get:

x² + y² = 25sin²(t) + 9cos²(t)

Since sin²(t) + cos²(t) = 1, we can substitute this into the equation:

x² + y² = 25(1) + 9(1) = 25 + 9 = 34

Therefore, the correct equation after eliminating the parameter is x² + y² = 34, which is not one of the given options. None of the options A, B, C, or D represents the equation obtained after eliminating the parameter.

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