o’tkir_burchak_sinusi,_kosinusi,_tangensi_va_kotangensi_geometriya

mavzu: o’tkir burchak sinusi, kosinusi, tangensi va kotangensi 9-sinflar uchun geometriya fanidan nishon tuman38 - maktab o’qituvchisi quvondiqova muxayyoning bir soatlik dars ishlanmasi to’g’ri burchakli uchburchakning o’tkir burchak sinusi α a c b ta’rif: to’g’ri burchakli uchburchak o’tkir (α) burchagining sinusi deb, α burchak qarshisidagi katet (bc)ning gipotenuza (ab) ga nisbatiga aytiladi. sin α “sinus alfa” to’g’ri burchakli uchburchakning o’tkir burchak kosinusi α a c b ta’rif: to’g’ri burchakli uchburchak (α) burchagining kosinusi deb, α burchak qarshisidagi katet (ac)ning gipotenuza (ab) ga nisbatiga aytiladi. cos α “kosinus alfa” to’g’ri burchakli uchburchakning o’tkir burchak tangensi α a c b ta’rif: to’g’ri burchakli uchburchak (α) burchagining tangensi deb, α burchak qarshis...

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