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Question

If a unit vector is represented by 0.5^i+0.8^j+c^k, then the value of ‘c’ is


  1. 0.11

  2. 0.01
     

  3. 0.39
     

  4. 1


Solution

The correct option is A

0.11


Magnitude of unit vector = 1
(0.5)2+(0.8)2+c2=1
By solving we get c=0.11.

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