MCQOPTIONS
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MCQOPTIONS
| 1. |
If \(\vec a, \vec b\) are vectors such that \(|\vec a + \vec b| = \sqrt {29}\) and \(\vec a \times (2\hat i + 3\hat j + 4\hat k) = (2\hat i + 3\hat j + 4\hat k) \times \vec b\) then possible value of \((\vec a + \vec b).(-7\hat i + 2\hat j + 3\hat k)\) is |
| A. | 0 |
| B. | 3 |
| C. | 4 |
| D. | 8 |
| Answer» D. 8 | |