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Question

What is the polar of the point (2, 3) with respect to the circle x2+y2 − 2x − 4y − 4 = 0


A

x + y = 10

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B

x + y = 12

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C

x -y = 6

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D

x - y = 10

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Solution

The correct option is B

x + y = 12


[x+y=12]

This can be found by the formula T = 0

Given equation is x2+y2 2x 4y 4 = 0

i.e., 2x + 3y (x+2) 2(y+3) 4 = 0

x + y 2 6 4 = 0

x + y = 12


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