11-BILET
1. Soddalashtiring: .
2. Tenglamani yeching: ││= 5x-x2
3. Agar tgα=-1,2 va bo‘lsa, ctg2α ni toping.
4. To‘g‘ri to‘rtburchak ta’rifini va uning xossalarini keltiring. To‘g‘ri to‘rtburchak xossalaridan birini isbotlang.
5. Uchburchakning tomonlari mos ravishda 2 sm, 3 sm va 4 sm. Bu uchburchakning burchaklarini kosinusini toping.
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