If `hata_(1)` and `hata_(2)` are two non collinear unit vectors inclined at `60^(@)` to each other then the value of `(hata_(1)-hata_(2)).(2hata_(1)+hata_(2))` is

If `hata_(1)` and `hata_(2)` are two non collinear unit vectors inclin

1.	If `hata_(1)` and `hata_(2)` are two non collinear unit vectors inclined at `60^(@)` to each other then the value of `(hata_(1)-hata_(2)).(2hata_(1)+hata_(2))` is
Answer» `a_(1)=a_(2)=1` `(veca_(1)-veca_(2)).(2veca_(1)+veca_(2))=2a_(1)^(2)-a_(2)^(2)-a_(1)a_(2)cos theta` `=2-1-(1)/(2)=(1)/(2)`

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If `hata_(1)` and `hata_(2)` are two non collinear unit vectors inclined at `60^(@)` to each other then the value of `(hata_(1)-hata_(2)).(2hata_(1)+hata_(2))` is

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