1.

`bar(A)=0.5hat(i)+0.4hat(j)+chat(K)` The value of c for which `bar(A)` is unit vector is :A. 0.1B. 0.59C. `sqrt(0.7)`D. `-sqrt(0.59)`

Answer» Correct Answer - D
`0.5^(2)+0.4^(2)+c^(2)=1^(2)`
`c=pmsqrt(0.59)`


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