A) \[\sqrt{{{c}_{1}}-c}\]
B) \[\sqrt{c-{{c}_{1}}}\]
C) \[\sqrt{{{c}_{1}}+c}\]
D) None of these
Correct Answer: B
Solution :
Suppose \[({{x}_{1}},\ {{y}_{1}})\] be any point on first circle from which tangent is to be drawn, then \[x_{1}^{2}+y_{1}^{2}+2g{{x}_{1}}+2f{{y}_{1}}+{{c}_{1}}=0\] ?. (i) and also length of tangent \[=\sqrt{{{S}_{2}}}=\sqrt{x_{1}^{2}+y_{1}^{2}+2g{{x}_{1}}+2f{{y}_{1}}+c}\] ?. (ii) From (i), we get (ii) as\[\sqrt{c-{{c}_{1}}}\].
You need to login to perform this action.
You will be redirected in
3 sec
