Tan x-1/tan x+1=1-cot x/1+cotx

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asked May 8, 2018 61.7k views

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Tan x-1/tan x+1=1-cot x/1+cotx

Mathematics
high-school

Martin Lottering asked

by Martin Lottering

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$(\tan x-1)/(\tan x+1)=((\sin x)/(\cos x)-1)/((\sin x)/(\cos x)+1)=(\sin x-\cos x)/(\sin x+\cos x)=(1-(\cos x)/(\sin x))/(1+(\cos x)/(\sin x))=(1-\cot x)/(1+\cot x)$

Jim Hudson answered May 13, 2018

by Jim Hudson

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