Circle And System Of Circles Question 367
Question: Length of the tangent from $ (x_1,y_1) $ to the circle $ x^{2}+y^{2}+2gx+2fy+c=0 $ is
[EAMCET 1980]
Options:
A) $ {{(x_1^{2}+y_1^{2}+2gx_1+2fy_1+c)}^{1/2}} $
B) $ {{(x_1^{2}+y_1^{2})}^{1/2}} $
C) $ {{[{{(x_1+g)}^{2}}+{{(y_1+f)}^{2}}]}^{1/2}} $
D) None of these
Show Answer
Answer:
Correct Answer: A
Solution:
It is obvious.
BETA
