12.The magnitude of (A+B) is
........ as that of (B+A).
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Answered by
0
Answer:
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Answered by
0
Answer:
Given:
C
=
A
+
B
C
.
C
=(
A
+
B
).(
A
+
B
)
C
2
=A
2
+B
2
+2ABcosθ
13
2
=12
2
+5
2+2(12)(5)
cosθcosθ=0⇒θ=π/2
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