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[" e "7.quad " If a unit vector is repre...

[" e "7.quad " If a unit vector is represented by "0.5hat i-0.8hat j+chat k,],[" then the value of' "c'" is :- "],[[" (A) "1," (B) "sqrt(0.11)],[" (C) "sqrt(0.01)," (D) "sqrt(0.39)]]

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