Question

If vectors a = 3i - j + 2k and b = 2i + j - k, then find (a x b)a.

Answer 1

NOTE: The product of \((\vec a\times\vec b)\) and  \(\vec a\) is not mentioned here.

We know, \(\hat i,\, \hat j\) and  \(\vec k\) are 3 unit vectors along x, y and z axis whose magnitudes are unity.

“FOR CROSS PRODUCT”