1.

If bar(a)=(3,1,-2) and bar(b)=(1,3,-2) then (bar(a)" "^(hat)bar(b)) = …………

Answer»

`cos^(-1)""(2sqrt(6))/(7)`
`pi-cos^(-1)""(5)/(7)`
`SIN^(-1)""(2sqrt(6))/(7)`
`TAN^(-1)""(5)/(2sqrt(6))`

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