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A unit vector is represented by $0 .5 \hat{i} + 0 .8 \hat{j} + c \hat{k}$ ,then the value of c is

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0.11

0.01

0.39

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Correct option is B

Magnitude of unit vector is always equal to 1 i.e. |A^|=1 ∴(0.5)2+(0.8)2+c2=1 ⟹c=0.11

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A unit vector is represented by 0.5i^+0.8j^+ck^,then the value of c is

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A unit vector is represented by $0 .5 \hat{i} + 0 .8 \hat{j} + c \hat{k}$ ,then the value of c is