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Angle between tangents drawn to x^(2) +y...

Angle between tangents drawn to `x^(2) +y^(2) -2x -4y +1=0` at the point where it is cut by the line, `y =2x +c`, is`(pi)/(2)` , then `:`

A

`|c | = sqrt( 5)`

B

`| c | =2 sqrt( 5)`

C

` |c | =sqrt( 10)`

D

` |c | = 2 sqrt( 10)`

Text Solution

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The correct Answer is:
C
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