1
NDA Mathematics 13 April 2025
MCQ (Single Correct Answer)
+2.5
-0.833
Change Language
If any point on an ellipse is (3sin$\alpha$, 5cos$\alpha$), then what is the eccentricity of the ellipse?
A
4/3
B
4/5
C
3/4
D
1/2
2
NDA Mathematics 1st September 2024
MCQ (Single Correct Answer)
+2.5
-0.833
Change Language
The foci of the ellipse 4x2 + 9y2 = 1 are at Q and R. If P(x, y) is any point on the ellipse, then what is PQ + PR equal to?
1
2
2
1
3
2/3
4
1/3
3
NDA Mathematics 21 April 2024
MCQ (Single Correct Answer)
+2.5
-0.83
Change Language

What is the eccentricity of the ellipse if the angle between the straight lines joining the foci to an extremity of the minor axis is 90°?

A

$\frac{1}{3}$

B

$\frac{1}{2}$

C

$\frac{1}{\sqrt{3}}$

D

$\frac{1}{\sqrt{2}}$

4
NDA Mathematics 16 April 2023
MCQ (Single Correct Answer)
+2.5
-0.83
Change Language

Consider the following for the next two (02) items that follow :

P(x, y) is any point on the ellipse x+ 4y2 = 1. Let E, F be the foci of the ellipse. 

What is PE + PF equal to ?
A
1
B
2
C
3
D
4
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