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Mathematics
Problem
The angle between the lines
2
x
−
y
+
3
=
0
2x - y + 3 = 0
2
x
−
y
+
3
=
0
and
x
+
2
y
+
3
=
0
x + 2y + 3 = 0
x
+
2
y
+
3
=
0
is a.
30
∘
30^\circ
3
0
∘
b.
45
∘
45^\circ
4
5
∘
c.
60
∘
60^\circ
6
0
∘
d.
90
∘
90^\circ
9
0
∘
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