Question

Please solve it step by step. I know it's answer but having a confusion in solution.
Please solve it completely. ​

Answer 1

Answer:

option (2)

Explanation:

The given vector is 4i+3j.

It can be observed that the given vector is in the xy plane which is always perpendicular to the z axis .

And from the options, only option (2) 2k is along the z axis which perpendicular to the given vector 4i+3j.

Answer 2

Answer:

The answer is option b) 7k^

Explanation:

the vector is in the xy plane. i.e, 4i^+3j^, then it is perpendicular to the vector in the z plane. i.e., 7k^. The resultant vector is perpendicular to the vector in the z plane. so, the answer is 7k^.