Physics, asked by radhich5, 2 months ago

IfA→.B→=∣∣∣A→ × B→∣∣∣A→.B→=|A→ × B→| , the angle betweenA→A→ andB→B→ is

Answers

Answered by anshu005512

1

Explanation:

∣

∣

∣

∣

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

∘

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