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Let veca and vecb be two unit vectors. I...

Let `veca and vecb` be two unit vectors. If the vecctors `vecc = hata + 2 hatb and vecd = 5 hata - 4 hatb` are perpendicular to each other, then the angle between `veca and vecb` is :

A

`pi/6`

B

`pi/2`

C

`pi/3`

D

`pi/4.`

Text Solution

Verified by Experts

The correct Answer is:
C
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