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The length (in units) of tangent from po...

The length (in units) of tangent from point `(5, 1)` to the circle `x^2+y^2+6x-4y-3=0` is

A

81

B

29

C

7

D

21

Text Solution

Verified by Experts

The correct Answer is:
C
Length of tangent from (5,1)to the circle =`sqrt(S_(1))`
= sqrt(5^(2) +1^(2) + 6.5 - 4.1 -3)`
` = sqrt49 = 7` units
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