In any ∆ABC prove that the area ∆ = b2 + c2-a24 cot A .

In any $∆ A B C$ prove that the area $∆ = \frac{b^{2} + c^{2} - a^{2}}{4 c o t A}$ .

Matching exercise

Match the items on the right to the items on the left.

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