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Mathematics
Mathematics
Problem
If
z
1
z_1
z
1
and
z
2
z_2
z
2
are two non-zero complex numbers, such that
∣
z
1
+
z
2
∣
=
∣
z
1
∣
+
∣
z
2
∣
|z_1 + z_2| = |z_1| + |z_2|
∣
z
1
+
z
2
∣
=
∣
z
1
∣
+
∣
z
2
∣
, then
arg
(
z
1
)
−
arg
(
z
2
)
\arg(z_1) - \arg(z_2)
ar
g
(
z
1
)
−
ar
g
(
z
2
)
is equal to a.
−
π
-\pi
−
π
b.
−
π
/
2
-\pi/2
−
π
/2
c.
π
/
2
\pi/2
π
/2
d. 0
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