A vector =0.5i+0.8j+ck when c=
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I think the question is not complete but as I know the question,here is your answer :-
=> We know that magnitude of unit vector is 1.
Therefore magnitude of 0.5i + 0.8j + ck must be 1.
Therefore,
1 = √(0.5² + 0.8² + c²)
1 = 0.25 + 0.64 + c²
c² = 1 - 0.89
c = √0.11
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