Curved Focus
Posted May 27, 2010
By admin
How to find the coordinates of the foci for the curve x^2 /16 + y^2 /9?
This is an horizontal ellipse with a^2=16 and b^2 =9 , then the foci is on X axis .-
a=4 , b =3 , c= sqrt (a^2-b^2 ) = +-5 relative to center coordinates .- Since it is on X axis, and center is (0,0) coordinate is
c(+- 5,0) .- If you have a center (h,k ) , Foci C( h+-5, k )
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