If a unit vector is represented by \( 0.5 \hat{i}-0.8 \hat{j}+c \ha...

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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
P
(a) \( \sqrt{0.01} \)
(b) \( \sqrt{0.11} \)
W)
(c) 1
(d) \( \sqrt{0.39} \)
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