Let ABC be a triangle with < BAC = 120° and |AB| ∙ |AC| = 1. Create a proof to express the length of the angle bisector AD in terms of x = |AB|.

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A: Given, A = −12mˆi + 4.0mˆj + 1.5mˆk B = 2.8Nˆi − 21Nˆk

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A: Since you have posted a question with a multiple sub parts, we will solve first three sub - parts…

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