O‘zbekistоn respublikаsi хаlq tа’limi vаzirligi respublikа tа’lim mаrkаzi

12-BILET

1. Ifodani soddalashtiring: _ .

2. y=│3-x│ funksiya grafigini yasang.

3. cosα=-0,8, _ bo‘lsa, tangensi va kotangensini aniqlang.

4. Qavariq ko‘pburchak ta’rifini va uning xossalarini keltiring. Qavariq ko‘pburchak diagonallari soni haqidagi teoremani isbotlang.

5. Teng yonli uchburchakning uchidagi burchagi 120^o ga, yon tomoni 3ga teng. Shu uchburchakka tashqi chizilgan aylana radiusini toping.

13-BILET 1. ni hisoblang 2. {an} arifmetik progressiyada a2+a9=20 bo‘lsa, S10 ni hisoblang. 3. Agar ctg(+)=2 bo‘lsa, ctgα ni toping. 4. Uchburchak o‘rta chizig‘ining ta’rifini keltiring. Uchburchak o‘rta chizig‘i haqidagi teoremani isbotlang. 5. Rombning katta dioganali 18 sm va bir burchagi 120^0 bo‘lsa, uning yuzini toping.