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The angles of triangle, two of whose ...

The angles of triangle, two of whose sides are represented by vectors `sqrt(3)( hat axx vec ba n d hat b-( hat adot hat b) hat a ,w h e r e vec b)` is a non zero vector and ` hat a` is unit vector in the direction of ` vec a ,` are `tan^(-1)(sqrt(3))` b. `tan^(-1)(1//sqrt(3))` c. `cot^(-1)(0)` d. `tan^(-1)(1)`

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