Wednesday

August 20, 2014

August 20, 2014

Posted by **Jasmine** on Wednesday, May 14, 2014 at 7:41pm.

3x^2+4y^2=12

- Trig -
**Reiny**, Wednesday, May 14, 2014 at 8:00pm3x^2 + 4y^2 = 12

divide by 12

x^2/4 + y^2/3 = 1

we know sin^2 t + cos^2 t = 1

so sin^2 t = x^2/4 = (x/2)^2

---> sin t x/s ----> x = 2sin t

and

cos^2 t = y^2/3 = (y/√3)^2

cos t = y/√3

----> y = √3cos t

x = 2sint

y = √4cost

confirmation:

http://www.wolframalpha.com/input/?i=x+%3D+2sint+%2C+y+%3D+√3cost

**Related Questions**

Math-Precalculus-Parametric Equations - Ellipses - The graph of the equation (x-...

Precalc - An ellipse has this Cartesian equation: ((x-2)/5)^2 + ((y-4)/3)^2 = 1 ...

geometry - The area of an ellipse in the form (x*x/a*a)+(y*y)/(b*b)=1 is A=3.14*...

calculus - (a) Modifying the parametric equations of a unit circle, find ...

Calculus - I seriously do not understand anything about this problem Please ...

math/Check! - a. An ellipse is formed by stretching the graph of x^2+ y^2=1 ...

someone please chek my math! - a. An ellipse is formed by stretching the graph ...

Calculus - find the equation for an ellipse that satisfies the following ...

Math - Find a parametric description for the ellipse having the focus F=(0,-4), ...

math - Find a parametric description for the ellipse having the focus F=(0,-4), ...