O'tkir burchakning sinusi, kosinusi, tangensi va kotangensi — 8-sinf Geometriya test savollari

1.ABC to'g'ri burchakli uchburchakda ÐC=90°, AC=24 sm, $BC$=7 sm, AB=25 sm. tgB ni toping.

• A)$\frac{24}{7}$
• B)$\frac{7}{24}$
• C)$\frac{7}{25}$
• D)$\frac{24}{25}$

2.To'g'ri burchakli uchburchak o'tkir burchagining kotangensi deb nimaga aytiladi?

• A)shu burchakka yopishgan katetning qarshisidagi katetga nisbatiga
• B)shu burchak qarshisidagi katetning yopishgan katetga nisbatiga
• C)shu burchakka yopishgan katetning gipotenuzaga nisbatiga
• D)gipotenuzaning yopishgan katetga nisbatiga

3.MNL to'g'ri burchakli uchburchakda ÐL=90°, ML=12 sm, NL=5 sm, MN=13 sm. M burchakning kotangensini toping.

• A)$\frac{12}{5}$
• B)$\frac{5}{12}$
• C)$\frac{5}{13}$
• D)$\frac{12}{13}$

4.To'g'ri burchakli uchburchak o'tkir burchagining sinusi deb nimaga aytiladi?

• A)shu burchak qarshisidagi katetning gipotenuzaga nisbatiga
• B)shu burchakka yopishgan katetning gipotenuzaga nisbatiga
• C)shu burchak qarshisidagi katetning yopishgan katetga nisbatiga
• D)shu burchakka yopishgan katetning qarshisidagi katetga nisbatiga

5.ABC to'g'ri burchakli uchburchakda ÐC=90°, AC=35 sm, $BC$=12 sm, AB=37 sm. ctgA ni toping.

• A)$\frac{35}{12}$
• B)$\frac{12}{35}$
• C)$\frac{12}{37}$
• D)$\frac{35}{37}$

6.ABC to'g'ri burchakli uchburchakda ÐC=90°, $BC$=9 sm, AC=40 sm, AB=41 sm. sinA ni toping.

• A)$\frac{9}{41}$
• B)$\frac{40}{41}$
• C)$\frac{9}{40}$
• D)$\frac{40}{9}$

7.ABC to'g'ri burchakli uchburchakda ÐC=90°, AC=9 sm, $BC$=12 sm, AB=15 sm. sinA ni toping.

• A)$\frac{4}{5}$
• B)$\frac{3}{5}$
• C)$\frac{4}{3}$
• D)$\frac{3}{4}$

8.sina $=\frac{a}{c}$ formulasida c nimani bildiradi?

• A)gipotenuzani
• B)burchakka yopishgan katetni
• C)burchak qarshisidagi katetni
• D)ikkinchi katetni

9.ABC to'g'ri burchakli uchburchakda ÐC=90°, $BC$=8 sm, AC=15 sm, AB=17 sm. cosB ni toping.

• A)$\frac{8}{17}$
• B)$\frac{15}{17}$
• C)$\frac{15}{8}$
• D)$\frac{8}{15}$

10.To'g'ri burchakli uchburchakda katet gipotenuzaga nisbatan qanday bo'ladi?

• A)gipotenuzadan kichik bo'ladi
• B)gipotenuzadan katta bo'ladi
• C)gipotenuzaga teng bo'ladi
• D)gipotenuza bilan taqqoslab bo'lmaydi