MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
| 1. |
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? |
| A. | π / 3 |
| B. | π / 4 |
| C. | π / 2 |
| D. | 2π / 3 |
| Answer» D. 2π / 3 | |