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Byju's Answer
Standard XI
Mathematics
Coordinates of a Point in Space
Write the arg...
Question
Write the argument of −i.
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Solution
Let
z
=
-
i
Then
,
Re
z
=
0
,
Im
z
=
-
1
Since
,
the
point
(
0
,
-
1
)
representing
z
=
0
-
i
lies
on
negative
direction
of
imaginary
axis
.
Therefore
,
arg
(
z
)
=
-
π
2
or
3
π
2
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