[" 19.Find a vector in the direction of the vector "(5hat i-hat j+2hat k)" which has magnitude "8" units."],[" 20Fualuate the nroduct "(3vec a-5vec b)(2vec a+7vec b)]

Find a vector of magnitue 8 units in the direction of the vector, vec(a) = 5hat(i) - hat(j) + 2hat(k)

Write a unit vector in the direction of the sum of the vectors vec a=2hat i+2hat j-5hat k and vec b=2hat i+hat j-7hat k

Find a unit vector in the direction of the sum of vectors vec a = 2 hat i + 2 hat j - 5 hat k and vec b = 2 hat i + hat j + 3 hat k .

Find a unit vector in the direction of the sum of the vectors: vec a= 2 hat i+ 2 hat j+ 5 hat k and vec b= 2 hat i+ hat j- 3 hat k .

Find the unit vector in the direction of vec a+vec b,quad if quad vec a=2hat i-hat j+2hat k and vec b=-hat i+hat j-hat k

Find the unit vector in the direction of the sum of the vectors, vec a=2 hat i+2 hat j-5 hat k and vec b=2 hat i+ hat j+3 hat k .

Find the unit vector in the direction of vec a+ vec b ,\ if\ vec a=2 hat i- hat j+2 hat k\ a n d\ vec b=- hat i+ hat j- hat kdot

Write a unit vector in the direction of the sum of the vectors vec a=2 hat i+2 hat j-5 hat k\ a n d\ vec b=2 hat i+ hat j-7 hat kdot

Find a unit vector in direction of vec a-vec b , when vec a = 4 hat i + 7 hat j + hat k and vec b =3 hat j-11 hat k .

If vec(a)=hat(i)+hat(j)-4hat(k) " and " vec(b)=4hat(i)-hat(j)-2hat(k) , then find (i) a unit vector in the direction of the vector (2vec(a)-vec(b)) and (ii) vector and scalar components of the vector (2vec(a)-vec(b)) along coordinate axes.