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If 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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detailed solution

Correct option is B

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

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

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