5. For what angle between A and B,|A+B|=|A-B|

1.	5. For what angle between A and B,\|A+B\|=\|A-B\|
Answer» ANSWER: ANGLE is 90 degree EXPLANATION: \|A+B\|^2 = \|A\|^2 + \|B\|^2 + 2.\|A\|\|B\|cosα \|A-B\|^2 = \|A\|^2 + \|B\|^2 - 2.\|A\|\|B\|cosα => \|A+B\|=\|A-B\| => 4.\|A\|\|B\|cosα = 0 => cosα = 0 => α = cos^-1 ( 0 ) => α = 90°

Answer»

ANSWER:

ANGLE is 90 degree

EXPLANATION:

|A+B|^2 = |A|^2 + |B|^2 + 2.|A||B|cosα

|A-B|^2 = |A|^2 + |B|^2 - 2.|A||B|cosα

=> |A+B|=|A-B|

=> 4.|A||B|cosα = 0

=> cosα = 0

=> α = cos^-1 ( 0 )

=> α = 90°

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5. For what angle between A and B,|A+B|=|A-B|​

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5. For what angle between A and B,|A+B|=|A-B|