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The angle made by the vector 2 hat(i) - ...

The angle made by the vector `2 hat(i) - hat(j) + hat(k)` with the plane represented by `r* (hat(i) +hat(j) + 2 hat(k))` = 7 is

A

`30^(@)`

B

`60^(@)`

C

`45^(@)`

D

`75^(@)`

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The correct Answer is:
A
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