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Question

Prove the identity. (show your work please)

tan(x − π/4)= (tan x − 1)/(tan x + 1)

Thank you!
11 years ago

Answers

Steve
since tan(x-y) = (tanx-tany)/(1+tanxtany)
just plug in y=pi/4 and the rest falls right out.
11 years ago

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