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The angle between A= hat(i) + 2hat(j) - ...

The angle between `A= hat(i) + 2hat(j) - hat(k) and bar(B)= -hat(i) + hat(j)-2 hat(k)` is

A

`30^(@)`

B

`45^(@)`

C

`60^(@)`

D

`90^(@)`

Text Solution

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The correct Answer is:
C
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