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ABC is a triangle in vertical plane. Its...

`ABC` is a triangle in vertical plane. Its two base angles `/_BAC` and `/_BCA` are `45^(@)` and `"tan"^(-1)1/3` respectively. A particle is projected from point `A` such that is passes through vertices `B` and `C`. Angle of projectio is `theta`. Find the value of `3 tan theta`.

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