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The angle between the vectors veca+vecb ...

The angle between the vectors `veca+vecb and veca-vecb` when `veca=(1,1,4) and vecb=(1,-1,4)` is

A

`45^(@)`

B

`90^(@)`

C

`15^(@)`

D

`30^(@)`

Text Solution

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The correct Answer is:
B
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