Given | → A + → B | = | → A − → B | Find the angle between → A and → B Options: A . &nbsp00 B . &nbsp450 C . &nbsp900 D . &nbsp600

Answer: Option C : C A 2 + B 2 + 2 A B c o s θ = A 2 + B 2 − 2 A c o s θ ⇒ 4 A B c o s θ = 0 ⇒ c o s θ = 0 ⇒ θ = 90 ∘

Given |→A+→B|=|→A−→B| Find the angle between

Question

Given

| \to A + \to B | = | \to A - \to B |

Find the angle between

\to A

and

\to B

Options:

A . 00

B . 450

C . 900

D . 600

Answer: Option C
:
C

A^{2} + B^{2} + 2 A B c o s θ = A^{2} + B^{2} - 2 A c o s θ \Rightarrow 4 A B c o s θ = 0 \Rightarrow c o s θ = 0 \Rightarrow θ = 90^{\circ}

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