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Grade 12Analytical Geometry

Determine the foci coordinates, the vertices, the length of the major axis, the minor axis, the eccentricity and the length of the latus rectum of the ellipse (x2/49) + (y2/36) = 1

Profile image of harshit
5 Years agoGrade 12
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1 Answer

Profile image of Harshit Singh
5 Years ago
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The given equation is (x^2/49) + (y^2/36) = 1

It can be written as (x^2/7^2) + (y^2/6^2) = 1

It is noticed that the denominator of x^2/49 is greater than the denominator of the y^2/36

On comparing the equation with (x^2/a^2) + (y^2/b^2) = 1, we will get

a= 7 and b = 6

Therefore, c = √(a^2– b^2)

Now, substitute the value of a and b

⇒ √(a^2– b^2) = √(72– 62) = √(49-36)

⇒ √13

Hence, the foci coordinates are ( ± √13, 0)

Eccentricity, e = c/a = √13/ 7

Length of the major axis = 2a = 2(7) = 14

Length of the minor axis = 2b = 2(6) =12

The coordinates of the vertices are ( ± 7, 0)

Latus rectum Length= 2b^2/a = 2(6)^2/7 = 2(36)/7 = 72/7

Thanks