Let veca=hati+2hatj-3hatk and vecb=lamda...

Let `veca=hati+2hatj-3hatk` and `vecb=lamdahatj+3hatk`. If the projection of `veca` on `vecb` is equal to the projection of `vecb` on `veca`, then the values of `lamda` are

A

`pmsqrt7`

B

`pmsqrt3`

C

`pm5`

D

`pm3`

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