September 2018 1 38 Report
Wykaż Tożsamość kąta ostrego :
a) tg alfa + cos alfa/1+sin alfa = 1/cos alfa
b) sin alfa/1+cos alfa + 1+cos alfa/sin alfa = 2/sin alfa
c) tg alfa * ctg alfa + 1 = 2(sin2 alfa + cas2 alfa)

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