i need to prove/verify
tan x + tan y / cot x + cot y = tan x + tan y
(tan x + tan y)/ (cot x + cot y)= tan x tan y
i need to prove/verify
tan x + tan y / cot x + cot y = tan x + tan y
(tan x + tan y)/ (cot x + cot y)= tan x tan y
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