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If a unit vector is represented by `0.5hati + 0.8hatj + chatk` the value of c isA. 1B. `sqrt(0.11)`C. `sqrt(0.01)`D. `sqrt(0.39)` |
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Answer» Correct Answer - 2 `1= sqrt((0.5)^(2) + (0.8)^(2) + c^(2))` `c^(2)+ 0.64+ 0.25 = 1 rArr c^(2) + 0.89 = 1` `rArr c= sqrt(0.11)` |
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