September 2018 1 29 Report
1.W trojkacie prostokatnymABC przyprostokatna AC ma dl.2 m przeciwprostokatna ma dl 5 m Oblicz cos alfa 2.Drabine o dl 2 m oparto o sciane w ten sposob ze tworzy ona z podloga kat 60 stopni.Na jakiej wysokosci lezy punk oparcia drabiny

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