# With Usual Notations, in δAbc, Prove that A(B Cos C − C Cos B) = B2 − C2 - Mathematics and Statistics

With usual notations, in ΔABC, prove that a(b cos C − c cos B) = b2 − c2

#### Solution

L.H.S. = a(b cos C − c cos B)

= R.H.S.

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