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The magnitudes of vectors vec(A),vec(B) ...

The magnitudes of vectors `vec(A),vec(B) and vec(C)` are 3,4 and 5 unit respectively. If `vec(A)+vec(B)=vec(C),` the angle between `vec(A) and vec(B)` is

A

`(pi)/(2)`

B

`cos^(-1)(0.6)`

C

`tan^(-1)((7)/(5))`

D

`(pi)/(4)`

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The correct Answer is:
A
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