Question: In Problems 4974, establish each identity. cot (a - 3) = cot a cot 3+1 cot 3 - cota

In Problems 49–74, establish each identity.cot (a - 3) = cot a cot 3+1 cot 3 -

cot (a - 3) = cot a cot 3+1 cot 3 - cota

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