January 2019 1 12 Report
Proszę pomóc zrobić mi zadania z matmy:
1.Kąt alfa jest ostry i sin alfa=3/5.Oblicz 2*tg alfa-cos alfa
2.cos 120°+sin150°/tg 135°
3.Uzasadnij tożsamość:
sin^2 alfa/tg^2 alfa=1-sin^2 alfa

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