First slide

Scalars and Vectors

Question

If A and B are two vectors such that |A+B|=2|A-B|, the angle between vectors A and B is

Moderate

A

$45 °$
B

$60 °$
C

$90 °$
D

Data insufficient

Solution

$\sqrt{A^{2} + B^{2} + 2 A B \cos θ} = 2 \sqrt{A^{2} + B^{2} - 2 A B \cos θ}$
From this equation, we cannot find $θ$ .

Get Instant Solutions

When in doubt download our app. Now available Google Play Store- Doubts App

Recieve an sms with download link

Doubts App

OR

SCAN ME

Doubts App

Doubts App