tg (π/2 + α) = - ctg α
tg (π + α) = tg α
tg (3π/2 + α) = - ctg α
tg (π/2 - α) = ctg α
tg (π - α) = - tg α
tg (3π/2 - α) = ctg α
tg (2π - α) = tg α
ctg (π/2 + α) = - tg α
ctg (π + α) = ctg α
ctg (3π/2 + α) = - tg α
ctg (π/2 - α) = tg α
ctg (π - α) = - ctg α
ctg (3π/2 - α) = tg α
ctg (2π - α) = ctg α
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Answers & Comments
tg (π/2 + α) = - ctg α
tg (π + α) = tg α
tg (3π/2 + α) = - ctg α
tg (π/2 - α) = ctg α
tg (π - α) = - tg α
tg (3π/2 - α) = ctg α
tg (2π - α) = tg α
ctg (π/2 + α) = - tg α
ctg (π + α) = ctg α
ctg (3π/2 + α) = - tg α
ctg (π/2 - α) = tg α
ctg (π - α) = - ctg α
ctg (3π/2 - α) = tg α
ctg (2π - α) = ctg α