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If a unit vector is represent 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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detailed solution

Correct option is B

For a unit vector, (0.5)2+(0.8)2+c2=1On solving, we get c=0.11

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If a unit vector is represent by 0.5i^+0.8j^+ck^ then the value of c is

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If a unit vector is represent by $0.5 \hat{i} + 0.8 \hat{j} + c \hat{k}$ then the value of c is