Answer :

Given that

Take cross product with ,

As

We know that

Now take cross product of b with given

As

From (i) and (ii)

Hence proved

We also need to show that

Now means vector triple product which is

But

Now is perpendicular to .

As cos 90° = 1

So, the dot product of with a perpendicular vector to is 0.

Hence proved

Rate this question :

How useful is this solution?

We strive to provide quality solutions. Please rate us to serve you better.

Try our Mini CourseMaster Important Topics in 7 DaysLearn from IITians, NITians, Doctors & Academic Expertsview all courses

Dedicated counsellor for each student

24X7 Doubt Resolution

Daily Report Card

Detailed Performance Evaluation