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If veca=1/(sqrt(10))(3hati+hatk),vecb=1/...

If `veca=1/(sqrt(10))(3hati+hatk),vecb=1/7(2hati+3hatj-6hatk)`, then the value of `(2veca-vecb).{(vecaxxvecb)xx(veca+2vecb)}` is

A

`-3`

B

5

C

3

D

`-5`

Text Solution

Verified by Experts

The correct Answer is:
D
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