Let P and , Where , Be Two Points On The Hyperbola . If (h, K) Is The Point Of Intersection Of The Normal’s At P and Q, Then K Is Equal To

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Question

Let P and , where , be two points on the hyperbola . If (h, k) is the point of intersection of the normal’s at P and Q, then k is equal to

Solution

Correct option is

 

P are two points on

                                                                     …… (1)

                                                                        …… (2)

Normal at P is   

                   

                     ……. (3)

Similarly normal at Q is

                            ……. (4)

To solve (3) and (4) for y multiplying (3) by sin Ï• and (4) by    sin θ, and then subtracting,

.

⇒ – by  = (a2 + b2) or y = k

 

SIMILAR QUESTIONS

Q1

Find the coordinates of foci, the eccentricity and latus rectum. Determine also the equation of its directrices for the hyperbola

4x2 – 9y2 =36.

Q2

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Q3

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Q4

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Q5

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Q6

 

Find the range of ‘a’ for which two perpendicular tangents can be drawn to the hyperbola from any point outside the hyperbola

.

Q7

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Q8

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Q9

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Q10

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