Let the foci of the ellipse `x^2/9+y^2=1` subtend a right angle at a point `P.` Then, the locus of `P` is (A) `x^2+y^2=1` (B) `x^2+y^2=2` (C) `x^2+y^2=4` (D) `x^2+y^2=8`

The locus of the midpoint of a chord of the circle x^2+y^2=4 which subtends a right angle at the origins is (a) x+y=2 (b) x^2+y^2=1 (c) x^2+y^2=2 (d) x+y=1

The locus of the midpoint of a chord of the circle x^2+y^2=4 which subtends a right angle at the origins is (a) x+y=2 (b) x^2+y^2=1 (c) x^2+y^2=2 (d) x+y=1

The locus of the midpoint of a chord of the circle x^2+y^2=4 which subtends a right angle at the origins is (a) x+y=2 (b) x^2+y^2=1 (c) x^2+y^2=2 (d) x+y=1

The locus of the midpoint of a chord of the circle x^2+y^2=4 which subtends a right angle at the origins is (a) x+y=2 (b) x^2+y^2=1 x^2+y^2=2 (d) x+y=1

The locus of the midpoint of a chord of the circle x^2+y^2=4 which subtends a right angle at the origins is (a) x+y=2 (b) x^2+y^2=1 x^2+y^2=2 (d) x+y=1

The coordinates of the foci of the ellipse 4x^(2) + 9y^(2) = 1 are

On the ellipse 4 x^(2)+9 y^(2)=1 , the point at which the tangent are parallel to 8 x=9 y are

Let P be the mid-point of a chord joining the vertex of the parabola y^(2)=8x to another point on it.Then,the locus of P is (A)y^(2)=2x (B) y^(2)=4x(C)(y^(2))/(4)+y^(2)=1(D)x^(2)+(y^(2))/(4)=1

The locus of the midpoint of a chord of the circle x^(2)+y^(2)=4 which subtends a right angle at the origins is x+y=2(b)x^(2)+y^(2)=1x^(2)+y^(2)=2(d)x+y=1