David proved the Law of Cosines with reference to ∆ABC using a different method. Arrange the steps of his proof in the correct sequence. (on simplification)
Therefore, .

(on simplification)
Similarly, prove that
and
.

(Transitive Property)

(on simplification)
In ,
(Pythagorean Theorem)

In ,
(Pythagorean Theorem)

Draw a perpendicular, , from B to side AC.
Let and .
Therefore, .

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