Find the equations of tangents to the hyperbola x 2 2 - y 2 8 = 1 which are parallel to 10 x - 3 y + 9 = 0 .

Given that, the equation of the hyperbola is x 2 2 - y 2 8 = 1 On comparing with the standard hyperbola equation x 2 a 2 - y 2 b 2 = 1 , we get a 2 = 2 , b 2 = 8 ⇒ a = 2 , b = 2 2 Also, given that the tangent is parallel to the line 10 x - 3 y + 9 = 0 . ∴ Required equation of the tangent is 10 x - 3 y + k = 0 ⇒ y = 10 3 x + k 3 ∴ m = 10 3 , c = k 3 We know that, the condition that the line y = m x + c is a tangent to hyperbola is c 2 = a 2 m 2 - b 2 . ⇒ k 3 2 = 2 10 3 2 - 8 ⇒ k 2 9 = 200 9 - 8 ⇒ k 2 9 = 128 9 ∴ k = ± 8 2 ∴ The equation of the required tangent is 10 x - 3 y ± 8 2 = 0 .

Find the equations of tangents to the hyperbola x 2 2 - y 2 8 = 1 which are parallel to 10 x - 3 y + 9 = 0 .

Given that, the equation of the hyperbola is x 2 2 - y 2 8 = 1 On comparing with the standard hyperbola equation x 2 a 2 - y 2 b 2 = 1 , we get a 2 = 2 , b 2 = 8 ⇒ a = 2 , b = 2 2 Also, given that the tangent is parallel to the line 10 x - 3 y + 9 = 0 . ∴ Required equation of the tangent is 10 x - 3 y + k = 0 ⇒ y = 10 3 x + k 3 ∴ m = 10 3 , c = k 3 We know that, the condition that the line y = m x + c is a tangent to hyperbola is c 2 = a 2 m 2 - b 2 . ⇒ k 3 2 = 2 10 3 2 - 8 ⇒ k 2 9 = 200 9 - 8 ⇒ k 2 9 = 128 9 ∴ k = ± 8 2 ∴ The equation of the required tangent is 10 x - 3 y ± 8 2 = 0 .

Consider the hyperbola H : x 2 - y 2 = 1 and a circle S with center N x 2 , 0 . Suppose that H and S touch each other at point P x 1 , y 1 with x 1 > 1 & y 1 > 0 . The common tangent to H and S at P intersects the x -axis at point M . If l , m is the centroid of the triangle Δ P M N , then the correct expression(s) is (are)

d l d x 1 = 1 + 1 3 x 1 2 for x 1 > 1

MEDIUM

Earn 100

Find the equations of tangents to the hyperbola $\frac{x^{2}}{2} - \frac{y^{2}}{8} = 1$ which are parallel to $10 x - 3 y + 9 = 0$ .

Important Questions on Two Dimensional Analytical Geometry-II

MEDIUM

Mathematics>Coordinate Geometry>Two Dimensional Analytical Geometry-II>Conic Sections

A tangent drawn to hyperbola

\frac{x^{2}}{a^{2}} - \frac{y^{2}}{b^{2}} = 1

P (\frac{π}{6})

forms a triangle of area

3 a^{2}

square units, with coordinate axes. If the eccentricity of hyperbola is

e

, then the value of

e^{2} - 9

HARD

Mathematics>Coordinate Geometry>Two Dimensional Analytical Geometry-II>Conic Sections

A line parallel to the straight line

2 x - y = 0

is tangent to the hyperbola

\frac{x^{2}}{4} - \frac{y^{2}}{2} = 1

at the point

(x_{1}, y_{1})

. Then

x_{1}^{2} + 5 y_{1}^{2}

is equal to

HARD

Mathematics>Coordinate Geometry>Two Dimensional Analytical Geometry-II>Conic Sections

Let

a

and

b

be positive real numbers such that

a > 1

and

b < a .

Let

P

be a point in the first quadrant that lies on the hyperbola

\frac{x^{2}}{a^{2}} - \frac{y^{2}}{b^{2}} = 1 .

Suppose the tangent to the hyperbola at

P

passes through the point

(1, 0),

and suppose the normal to the hyperbola at

P

cuts off equal intercepts on the coordinate axes. Let

Δ

denote the area of the triangle formed by the tangent at

P

, the normal at

P

and the

x

-axis. If

e

denotes the eccentricity of the hyperbola, then which of the following statements is/are TRUE?

EASY

Mathematics>Coordinate Geometry>Two Dimensional Analytical Geometry-II>Conic Sections

The equation of a tangent to the hyperbola,

4 x^{2} - 5 y^{2} = 20,

parallel to the line

x - y = 2,

HARD

Mathematics>Coordinate Geometry>Two Dimensional Analytical Geometry-II>Conic Sections

Consider the hyperbola

H : x^{2} - y^{2} = 1

and a circle

S

with center

N (x_{2}, 0) .

Suppose that

H

and

S

touch each other at point

P (x_{1}, y_{1})

with

x_{1} > 1 & y_{1} > 0 .

The common tangent to

H

and

S

P

intersects the

x

-axis at point

M

. If

(l, m)

is the centroid of the triangle

Δ P M N,

then the correct expression(s) is (are)

HARD

Mathematics>Coordinate Geometry>Two Dimensional Analytical Geometry-II>Conic Sections

Equation of a tangent to the hyperbola

5 x^{2} - y^{2} = 5

and which passes through an external point

(2, 8)

HARD

Mathematics>Coordinate Geometry>Two Dimensional Analytical Geometry-II>Conic Sections

If the line

y = m x + c

is a common tangent to the hyperbola

\frac{x^{2}}{100} - \frac{y^{2}}{64} = 1

and the circle

x^{2} + y^{2} = 36,

then which one of the following is true?

HARD

Mathematics>Coordinate Geometry>Two Dimensional Analytical Geometry-II>Conic Sections

The total number of points on the curve

x^{2} - 4 y^{2} = 1

at which the tangents to the curves are parallel to the line

x = 2 y

HARD

Mathematics>Coordinate Geometry>Two Dimensional Analytical Geometry-II>Conic Sections

2 x - y + 1 = 0

is a tangent to the hyperbola

\frac{x^{2}}{a^{2}} - \frac{y^{2}}{16} = 1

, then which of the following CANNOT be sides of a right angled triangle?

EASY

Mathematics>Coordinate Geometry>Two Dimensional Analytical Geometry-II>Conic Sections

If the eccentricity of the standard hyperbola passing through the point

(4,6)

2,

then the equation of the tangent to the hyperbola at

(4,6)

is:

EASY

Mathematics>Coordinate Geometry>Two Dimensional Analytical Geometry-II>Conic Sections

The straight line

x + y = \sqrt{2} p

will touch the hyperbola

4 x^{2} - 9 y^{2} = 36

MEDIUM

Mathematics>Coordinate Geometry>Two Dimensional Analytical Geometry-II>Conic Sections

A hyperbola passes through the point

P (\sqrt{2}, \sqrt{3})

and has foci at

(\pm 2, 0)

. Then the tangent to this hyperbola at

P

also passes through the point

EASY

Mathematics>Coordinate Geometry>Two Dimensional Analytical Geometry-II>Conic Sections

Consider a hyperbola

H : x^{2} - 2 y^{2} = 4

. Let the tangent at a point

P (4, \sqrt{6})

meet the

x

-axis at

Q

and latus rectum at

R (x_{1}, y_{1}), x_{1} > 0

. If

F

is a focus of

H

which is nearer to the point

P

, then the area of

Δ Q F R

(in sq. units) is equal to

MEDIUM

Mathematics>Coordinate Geometry>Two Dimensional Analytical Geometry-II>Conic Sections

The distance between the tangents to the hyperbola

\frac{x^{2}}{20} - \frac{3 y^{2}}{4} = 1

which are parallel to the line

x + 3 y = 7

MEDIUM

Mathematics>Coordinate Geometry>Two Dimensional Analytical Geometry-II>Conic Sections

The locus of the midpoints of the chord of the circle,

x^{2} + y^{2} = 25

which is tangent to the hyperbola,

\frac{x^{2}}{9} - \frac{y^{2}}{16} = 1

is :

MEDIUM

Mathematics>Coordinate Geometry>Two Dimensional Analytical Geometry-II>Conic Sections

The point

P (- 2 \sqrt{6}, \sqrt{3})

lies on the hyperbola

\frac{x^{2}}{a^{2}} - \frac{y^{2}}{b^{2}} = 1

having eccentricity

\frac{\sqrt{5}}{2} .

If the tangent and normal at $P$ to the hyperbola intersect its conjugate axis at the points

Q

and

R

respectively, then

Q R

is equal to:

HARD

Mathematics>Coordinate Geometry>Two Dimensional Analytical Geometry-II>Conic Sections

Let a line

L : 2 x + y = k, k > 0

be a tangent to the hyperbola

x^{2} - y^{2} = 3 .

L

is also a tangent to the parabola

y^{2} = α x,

then

α

is equal to:

EASY

Mathematics>Coordinate Geometry>Two Dimensional Analytical Geometry-II>Conic Sections

Let

P

be the point of intersection of the common tangents to the parabola

y^{2} = 12 x

and the hyperbola

8 x^{2} - y^{2} = 8

. If

S

and

S^{'}

denote the foci of the hyperbola where

S

lies on the positive

x

-axis then

P

divides

S S^{'}

in a ratio:

EASY

Mathematics>Coordinate Geometry>Two Dimensional Analytical Geometry-II>Conic Sections

The tangent at an extremity (in the first quadrant) of the latus rectum of the hyperbola $\frac{x^{2}}{4} - \frac{y^{2}}{5} = 1$ , meets the $x$ -axis and $y$ -axis at $A$ and $B$ , respectively. Then $O A^{2} - O B^{2}$ , where $O$ is the origin, equals

EASY

Mathematics>Coordinate Geometry>Two Dimensional Analytical Geometry-II>Conic Sections

If the line

2 x + \sqrt{6} y = 2

touches the hyperbola

x^{2} - 2 y^{2} = 4,

then the point of contact is

Find the equations of tangents to the hyperbola x22-y28=1 which are parallel to 10x-3y+9=0.

Important Questions on Two Dimensional Analytical Geometry-II

Learn and Prepare for any exam you want !

Find the equations of tangents to the hyperbola $\frac{x^{2}}{2} - \frac{y^{2}}{8} = 1$ which are parallel to $10 x - 3 y + 9 = 0$ .