TOŻSAMOŚCI TRYGONOMETRYCZNE proszę z objaśnieniem...bo naprawde jestem oporny co do tych tematów
cosα + cosα x tgα =
sinα + cosα x ctgα =
1/sin²α x (1- cos²α) =
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cosα+cosα*tgα = cosα+cosα*(sinα/cosα) = cosα+sinα
sinα+cosα*ctgα = sinα+cosα*(cosα/sinα) = sinα+cos²α/sinα = (sin²α/sinα)+ cos²α/sinα = (sin²α+cos²α)/sinα = 1/sinα
(1/sin²α)*(1-cos²α) = (1/sin²α)*sin²α = 1