MCQOPTIONS
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MCQOPTIONS
| 1. |
The direction cosines of the vector \(\vec a = (-2\hat i + \hat j -5 \hat k)\) are? |
| A. | -2, 1, -5 |
| B. | \(\frac 1 3, \frac {-1}6, \frac {-5}6\) |
| C. | \(\frac 2 {\sqrt {30}},\frac 1 {\sqrt {30}},\frac 5 {\sqrt {30}}\) |
| D. | \(\frac {-2} {\sqrt {30}},\frac 1 {\sqrt {30}},\frac {-5} {\sqrt {30}}\) |
| Answer» E. | |