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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


A

1

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B

0.11

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C

0.01

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D

0.39

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Solution

The correct option is B

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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