Question

solve this problem ASAP image is attached​

Answer 1

Answer:

i x j=k, j.k=0. As I and j are unit vector and are perpendicular to each other so it's cross products is ixj= ixjxsin90°= 1 k, while j and k are also perpendicular to each other so it's dot product is j.k= jxkxcos90°=0