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* 1 + tan^2 ● = sec^2 ●
> tan^2 ● = sec^2 ● - 1
> tan^2 ● - sec^2 ● = -1
> tan ● = raíz(sec^2 -1)
* 1 + cot^2 ● = Csc^2 ●
> cot^2 ● = Csc^2 ● - 1
> cot^2 ● - Csc^2 ● = -1
> cot ● = raíz(csc^2 ● - 1)
suerte :)