Question

cot (Ato). cot (A-B) = 1​

Answer 1

Step-by-step explanation:

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Answer 2

$question \: -$

Cot ( A + B) Cot (A-B) = 1

Answer —

$cot \: (a + b) \: \: \: \: \: \: \: cot \: (a - b) = 1\\ \\ (cot \: a \: + \: cot \: b) \: \: \: \: \: (cot \: a \: - cot \: b) = 1 \\ \\ ({cot \: a \: })^{2} - ({cot \: b \: })^{2} = 1 \: \: \: \: (by \: using \: - \: {a}^{2} - {b}^{2} = (a + b) \: (a - b)$

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