Home › TS EAMCET › Mathematics › Coordinate Geometry: System of Circles › The length of the tangent from (5,5) to x²+y²-2x…
The length of the tangent from (5,5) to x²+y²-2x-4y-4=0 is
A3
B4
C5
D16
Answer & Solution
Correct answer: B. 4
Substituting (5,5) gives 25+25-10-20-4 = 16, and the tangent length is the square root of 16.
Related questions
The plane of the common circle of two spheres is the?Four points fix a unique sphere if they are?Base points that define a pencil of conics?Points in general position that fix a conic?The line shared by every plane of a pencil of planes is its?The common point of a pencil of lines is its?The radical plane of two spheres has equal what?In the chords and secants theorems, power of a point is the?