Question

find the projection of a and b if a=3i+2j,b=i+j

Answer 1

Answer:

a

1

=2,a

2

=−1,a

3

=1,b

1

=1,b

2

=−2,b

3

=4

cross product is (a

2

b

3

−b

2

a

3

)i+(a

3

b

1

−b

3

a

1

)j+(a

1

b

2

−a

2

b

1

)k=−2i+7j−3k