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In DeltaABC, prove that: (a-b)/c=(sin(A-...

In `DeltaABC`, prove that: `(a-b)/c=(sin(A-B)/(2))/(cosC/2)`

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To prove that \(\frac{a-b}{c} = \frac{\sin(A-B)/2}{\cos(C/2)}\) in triangle \(ABC\), we will follow these steps: ### Step 1: Use the Sine Rule According to the Sine Rule, we have: \[ \frac{a}{\sin A} = \frac{b}{\sin B} = \frac{c}{\sin C} = k \] where \(k\) is a constant. ...
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