If the projection of `vec(a) = lamda hat(i) + hat(j) + 4hat(k) " on " vec(b) = 2hat(i) + 6hat(j) + 3hat(k)` is 4 units, then find `lamda`

Find the projection of vec(a) = 2 hat(i) - hat(j) + hat(k) on vec(b) = hat(i) - 2 hat(j) + hat(k) .

Find 'lambda' when the projection of vec(a) = lambda hat(i) + hat(j) + 4hat(k) on vec(b) = 2hat(i) + 6hat(j) + 3hat(k) is 4 units.

Find lambda where projection of vec (a) = lambda hat (i) + hat (j) + 4 hat (k) on vec (b) = 2 hat (i) + 6 hat (i) + 3 hat (k) is 4 unit

Find lambda where projection of vec (a) = lambda hat (i) + hat (j) + 4 hat (k) on vec (b) = 2 hat (i) + 6 hat (i) + 3 hat (k) is 4 unit

Find the scalar projection of : vec(a)=7hat(i)+hat(j)-4hat(k) on vec(b)=2hat(i)+6hat(j)+3hat(k)

Find lambda, when the projection of vec a=lambda hat i+ hat j+4 hat k\ on\ vec b=2 hat i+6 hat j+3 hat k\ i s\ 4\ units.

If vec(a)= 2 hat(i) + 3hat(j) + 4hat(k) and vec(b) = 3hat(i) + 2hat(j) - lamda hat(k) are perpendicular, then what is the value of lamda ?