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If the angle between the circle x^2+y^2-...

If the angle between the circle `x^2+y^2-2x-4y+c=0` and `x^2+y^2-4x-2y+4=0` is `60^@`, then C is equal to

A

`(3+-sqrt(5))/(2)`

B

`(6+-sqrt(5))/(2)`

C

`(9+-sqrt(5))/(2)`

D

`(7+-sqrt(5))/(2)`

Text Solution

Verified by Experts

The correct Answer is:
D
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