In an ellipse, the distance between its focii is 6 and minor axis is 8. Then its eccentricity is,
3/5
1/2
4/5
1/
As we learnt in
Coordinates of foci -
- wherein
For the ellipse
Length of major axis -
- wherein
Semi minor axis
Eccentricity -
- wherein
For the ellipse
Distance between its focii is 6.
2ae = 6; ae = 3
minor axis, 2b = 8; b=4
b2 = a2(1-e2)
b2 = a2- a2e2
a2=25 a=5
Option 1)
3/5
this is correct option
Option 2)
1/2
this is incorrect option
Option 3)
4/5
this is incorrect option
Option 4)
1/
this is incorrect option
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