engineering recuitment ISRO Scientist Mechanical Mock Test Mathematics Vector Algebra Scalar and Vector Product
If \(\vec a = \left(\vec i + 2\vec j - 3\vec k\right)\) and \(\vec b = \left(3\vec i - \vec j + 2\vec k\right)\) then the angle between \(\left(\vec a + \vec b\right)\) and \(\left(\vec a - \vec b\right)\) is?
1
π / 3
2
π / 4
3
π / 2
4
2π / 3