Question: Prove the identity. cot(x - y) = cot(x) cot(y) + 1 cot(y) - cot(x) Use a Reciprocal Identity, and then use a Subtraction Formula. cot(x

Prove the identity. cot(x - y) = cot(x) cot(y) + 1 cot(y) - cot(x) Use a Reciprocal Identity, and then use a Subtraction Formula. cot(x - y) = tan + tan(x) tan(y) tan(x) - tan(y) Use a Reciprocal Identity, And then simplify the compound fraction. + cot(x ) cot(y) cot(x) cot(y) cot(x) cot(y) cot(y) - cot(x) cot(x) cot(y)

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