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vecA=4hati+4hatj-4hatk and vecB=3hati+ha...

`vecA=4hati+4hatj-4hatk` and `vecB=3hati+hatj+4hatk`, then angle between vectors `vecA` and `vecB` is

A

`180^0`

B

`90^0`

C

`45^0`

D

`0^0`

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