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Mathematics
Mathematics
Problem
Let
O
O
O
be the centre of a circle of radius
r
r
r
and let
P
P
P
be any point in the plane. Which one of the following conditions on
O
P
OP
O
P
ensures that exactly two tangents can be drawn from
P
P
P
to the circle? a)
O
P
=
r
OP=r
O
P
=
r
b)
O
P
<
r
OP<r
O
P
<
r
c)
O
P
>
r
OP>r
O
P
>
r
d)
O
P
≤
r
OP\le r
O
P
≤
r
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