Can someone help me with these two Refer to the vectors gi

Can someone help me with these two :( ??

Refer to the vectors given below. u_1[-3 1 2]u_2[1 1 1]. Compute the following projections. Refer to the vectors given below. u_1[-3 1 2]u_2[1 1 1].

Solution

1.a) projection of u2 on u3 is equal to

u2.u3/mod(u3)

=(2+0-1)/sqrt(2^2+0^2+(-1)^2)

=1/sqrt(5)

(b) projection of u2 on u1

=u2.u1/mod(u1)

=(-3 +1+2)/sqrt((-3)^2+(1)^2+(2)^2)

=0