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77-Dars. 2.15.8 Yarim Burchak Formulalari
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75-Dars. 2.15.5 Ikkilangan Burchak Formulalari
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3-SINF 75- DARS
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78-Dars. 2.15.9 Arcsin, Arccos, Arctg, Arcctg, ARALASH
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73-Dars. 2.15.3 Keltirish Formulalari
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