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Q.

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

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a

1

b

0.11

c

0.01

d

0.39

answer is B.

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Detailed Solution

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