To'ldiruvchi burchakning trigonometrik funksiyalari uchun formulalar — 8-sinf Geometriya test savollari

1.A va B — to'g'ri burchakli uchburchakning o'tkir burchaklari. Agar sinB$=\frac{3}{5}$ bo'lsa, tgA ni toping.

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

2.A va B — to'g'ri burchakli uchburchakning o'tkir burchaklari (to'ldiruvchi). Agar cosA=0,6 bo'lsa, sinB va cosB ni toping.

• A)sinB=0,6; cosB=0,8
• B)sinB=0,8; cosB=0,6
• C)sinB=0,6; cosB=0,6
• D)sinB=0,4; cosB=0,8

3.Agar sin(90°-a)=0,8 bo'lsa, sina ni toping.

• A)0,6
• B)0,8
• C)0,4
• D)0,36

4.Agar ctgx=tg20° bo'lsa, o'tkir x burchakni toping.

• A)70°
• B)20°
• C)110°
• D)160°

5.A va B — to'g'ri burchakli uchburchakning o'tkir burchaklari. Agar sinB$=\frac{1}{5}$ bo'lsa, tgA ni toping.

• A)2√6
• B)√$\frac{24}{5}$
• C)2√$\frac{6}{5}$
• D)24

6.Agar sinx=cos40° bo'lsa, o'tkir x burchakni toping.

• A)50°
• B)40°
• C)140°
• D)90°

7.Agar cosx=sin76° bo'lsa, o'tkir x burchakni toping.

• A)14°
• B)76°
• C)104°
• D)66°

8.Agar tgx=ctg56° bo'lsa, o'tkir x burchakni toping.

• A)34°
• B)56°
• C)146°
• D)44°

9.Agar ctgx=tg16° bo'lsa, o'tkir x burchakni toping.

• A)74°
• B)16°
• C)106°
• D)84°

10.To'ldiruvchi burchaklar deb qanday burchaklarga aytiladi?

• A)yig'indisi 90° ga teng bo'lgan ikki burchakka
• B)yig'indisi 180° ga teng bo'lgan ikki burchakka
• C)yig'indisi 360° ga teng bo'lgan ikki burchakka
• D)o'zaro teng ikki burchakka