Find `| veca xx vecb| ` where `veca = 3 hati - hatj + 2 hatk and vecb = 2 hat i + 3 hatj - 4hatk.`

Find a unit vector perpendicular to each of vectors (veca + vecb) and ( veca - vecb) where veca = hati+ hatj + hatk and vecb = hati + 2hatj + 3hatk .

Find the unit vector in the direction of the vector veca+vecb where veca =2hati - hatj +2 hatk and vecb = - hatj +hatj- hatk

What is the angle between vectors veca = hati - hatj + hatk and vecb = hati + hatj - hatk ?

Find a unit vector perpendicular to each of the vectors veca+vecb and veca-vecb , where veca=3hati+2hatj+2hatk and vecb=hati+2hatj-2hatk .

What is the projection of veca = 2hati - hatj + hatk on vec b = hati - 2hatj +hatk ?

Find the area of a parallelogram having diagonals given by the vectors veca = 3hati+ hatj- 2hatk, vecb = hati - 3 hatj + 4hatk .