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Problem
Problem
Given that
P
=
12
P = 12
P
=
12
,
Q
=
5
Q = 5
Q
=
5
and
R
=
13
R = 13
R
=
13
also
P
+
Q
=
R
\mathbf{P} + \mathbf{Q} = \mathbf{R}
P
+
Q
=
R
, then the angle between
P
and
Q
will be a.
π
\pi
π
b.
π
2
\frac{\pi}{2}
2
π
c. zero d.
π
4
\frac{\pi}{4}
4
π
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