December 2018 1 21 Report
Jeżeli alfa jest kątem ostrym i tg alfa=2 to:


A) sin alfa=(3 i pierwiastek z 5)/5
B) sin alfa=(pierwiastek z 5)/5
C) cos alfa=(pierwiastek z 5)/5
D) cos alfa=(3 i pierwiastek z 5)/5
prosze o obliczenia:)

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