defence exam Agniveer Vayu Group X & XY Mock Test 01/2026 Mathematics Parabola, Ellipse and Hyperbola Tangents and Normals to Conics
When x = a cos t, y = b sin t, and t =π/4 , the length of the sub-tangents of the ellipse will be:
1
b / √2
2
b
3
a / √2
4
a