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Mathematics
Mathematics
Problem
- If
∣
a
∣
+
∣
b
∣
=
∣
c
∣
|\mathbf{a}| + |\mathbf{b}| = |\mathbf{c}|
∣
a
∣
+
∣
b
∣
=
∣
c
∣
and
a
+
b
=
c
\mathbf{a} + \mathbf{b} = \mathbf{c}
a
+
b
=
c
, then find the angle between
a
\mathbf{a}
a
and
b
\mathbf{b}
b
.
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