1
IIT-JEE 1998
MCQ (More than One Correct Answer)
+2
-0.5
The number of common tangents to the circles $${x^2}\, + \,{y^2} = 4$$ and $${x^2}\, + \,{y^2}\, - 6x\, - 8y = 24$$ is
A
0
B
1
C
3
D
4
2
IIT-JEE 1988
MCQ (More than One Correct Answer)
+2
-0.5
The equations of the tangents drawn from the origin to the circle $${x^2}\, + \,{y^2}\, - \,2rx\,\, - 2hy\, + {h^2} = 0$$, are
A
x = 0
B
y = 0
C
$$({h^2}\, - \,{r^2})\,x - \,\,2rhy\, = \,0$$
D
$$({h^2}\, - \,{r^2})\,x + \,\,2rhy\, = \,0$$
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