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

Let `veca` and `vecb` be two unit vectors and `theta` is the angle between them. Then `veca+vecb` is a unit vector if :

A

`theta=pi/4`

B

`theta=pi/3`

C

`theta=pi/2`

D

`theta=(2pi)/3`.

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MODERN PUBLICATION-VECTORS-Exercise
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  12. If veca=2hati-hatj+hatk and vecb=-2hati+hatk, then the vector in the d...

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  13. If veca and vecb are two collinear vectors, then which of the followi...

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  14. If vecaxxvecb=|veca||vecb|sin theta hatn, which one is correct ?

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  15. If veca*vecb=-|veca||vecb|, then theta=

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  16. The projection of the vector veca=2hati+3hatj+2hatk on the vector vecb...

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  17. The area of triangle having adjacent sides veca and vecb is :

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