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Two vector vec(V)andvec(V) have equal m...

Two vector `vec(V)andvec(V)` have equal magnitudes. If magnitude of `vec(A)+vec(B)` is equal to n time the magnitude of `vec(A)-vec(B)`, then angel to between `vec(A) and vec(B)` 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^(2)+1))`

Text Solution

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The correct Answer is:
B
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