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Given veca = hati+2hatj + 3hatk, vecb= -...

Given `veca = hati+2hatj + 3hatk, vecb= -hati+2hatj+hatk, vecc =3hati+hatj,` find a unit vector in the direction of the resultant of these vectors. Also find a vector `vecr` which is normal to both `veca` and `vecb`. What is the inclination of `vecr` to `vecc`?

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