Fig.
10
shows
a sketch
of
a circle
with...
![subject](/tpl/images/cats/mat.png)
Mathematics, 18.03.2021 15:00 JaceJose12
Fig.
10
shows
a sketch
of
a circle
with
centre
C
(4,
2).
The
circle
intersects
the
x-axis
at
A(l,
0)
and
at
B.
y
C (4, 2)
•
Fig.
10
(i)
Write
down
the
coordinates
ofB.
[l]
(ii)
Find
the
radius
of
the
circle
and
hence
write
down
the
equation
of
the
circle
.
[4]
(iii)
AD
is a diameter
of
the
circle.
Find
the
coordinates
of
D.
[2]
(iv)
Find
the
equation
of
the
tangent
to
the
circle
at
D.
Give
your
answer
in
the
form
y
=
ax+b​
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