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Read the following information carefully and answer the questions given below
`a+b+c= 0` such that `|a|= 3, |b|=5 and |c|=7`
What is cosine of the angle between b and c?

A

`(11)/(12)`

B

`(13)/(14)`

C

`-(11)/(2)`

D

`-(13)/(14)`

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The correct Answer is:
D
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