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Ifa,b,c are vectors such that a + b + c ...

Ifa,b,c are vectors such that a + b + c = 0 and | a | = 7, | b | = 5,| c | = 3, then the angle between c and b is a)`pi//3`b)`pi//6` c)`pi//4` d)`pi`

A

`pi//3`

B

`pi//6`

C

`pi//4`

D

`pi`

Text Solution

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The correct Answer is:
A
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