How to find an equation that models a hyperbolic lens with a=12 inches and foci that are 26 inches apart, assume that the center of the hyperbola is the origin and the transverse axis is vertical?

Ciara Perez

Ciara Perez

Answered question

2023-02-02

How to find an equation that models a hyperbolic lens with a=12 inches and foci that are 26 inches apart, assume that the center of the hyperbola is the origin and the transverse axis is vertical?

Answer & Explanation

Anya Rice

Anya Rice

Beginner2023-02-03Added 9 answers

The hyperbola's equation with a vertical transverse axis is as follows:
( y - k ) 2 a 2 - ( x - h ) 2 b 2 = 1 [1]
We are given that the center is the origin; this means that h = k = 0
( y - 0 ) 2 a 2 - ( x - 0 ) 2 b 2 = 1 [2]
We are given that a = 12 :
( y - 0 ) 2 12 2 - ( x - 0 ) 2 b 2 = 1 [2]
We are given that the foci are 26 inches apart; this means that the focal length is 13:
13 = a 2 + b 2
13 2 = 12 2 + b 2
b = 169 - 144
b = 25
b = 5
( y - 0 ) 2 12 2 - ( x - 0 ) 2 5 2 = 1 answer

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