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Byju's Answer
Standard XII
Mathematics
Foot of the Perpendicular from a Point on a Plane
If z is compl...
Question
If z is complex number then interpret the locus of following in complex plane
A
r
g
(
z
+
i
)
−
A
r
g
(
z
−
i
)
=
π
2
.
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Solution
A
r
g
(
z
+
i
)
−
A
r
g
(
z
−
i
)
=
Π
2
Let
z
=
x
+
i
y
⇒
A
r
g
(
x
+
i
y
+
i
)
−
A
r
g
(
x
+
i
y
−
i
)
=
Π
/
2
⇒
y
+
1
x
−
y
−
1
x
=
1
0
⇒
y
+
1
−
y
+
1
x
=
1
0
⇒
x
=
0
∴
x
=
0
is the locus of
z
.
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