find the angle between a vector and B vector
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Answer:
StepWe have
∣
∣
∣
∣
a
+
b
∣
∣
∣
∣
=
∣
∣
∣
∣
a
−
b
∣
∣
∣
∣
⇒
∣
∣
∣
∣
a
+
b
∣
∣
∣
∣
2
=
∣
∣
∣
∣
a
−
b
∣
∣
∣
∣
2
⇒
∣
∣
∣
∣
a
∣
∣
∣
∣
2
+
∣
∣
∣
∣
b
∣
∣
∣
∣
2
+2
a
.
b
=
∣
∣
∣
∣
a
∣
∣
∣
∣
2
+
∣
∣
∣
∣
b
∣
∣
∣
∣
2
−2
a
.
b
⇒
a
.
b
=0
∴
a
⊥
b
∴θ=90
∘-by-step explanation:
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