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Two vectors vecA and vecB have equal mag...

Two vectors `vecA` and `vecB` have equal magnitudes. The magnitude of `(vecA+vecB)` is n times the magnitude of `(vecA-vecB)`. The angle between `vecA` and `vecB` is :

A

`cos^(-1)((n-1)/(n+1))`

B

`cos^(-1)((n^(2)-1)/(n^(2)+1))`

C

`sin^(-1)((n-1)/(n+1))`

D

`sin^(-1)((n^(2)-1)/(n^(3)+1))`

Text Solution

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The correct Answer is:
B
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