0° dan 180° gacha bo‘lgan burchakning sinusi, kosinusi, tangensi va kotangensi — 9-sinf Geometriya test savollari

1.sin150° ni toping.

• A)√$\frac{3}{2}$
• B)$\frac{1}{2}$
• C)√$\frac{2}{2}$
• D)$-\frac{1}{2}$

2.cos120° ni toping.

• A)$\frac{1}{2}$
• B)$-\frac{1}{2}$
• C)√$\frac{3}{2}$
• D)-√$\frac{3}{2}$

3.tan135° ni toping.

• A)√$\frac{3}{3}$
• B)1
• C)-√3
• D)-1

4.120° burchakning kotangensini toping.

• A)√3
• B)-√$\frac{3}{3}$
• C)-√3
• D)√$\frac{3}{3}$

5.sin$\alpha =\frac{3}{5}$, bunda α o‘tmas burchak (90° < α < 180°). cosα ni toping.

• A)-0,8
• B)0,6
• C)-0,6
• D)0,8

6.sinα = 0,6, α — o‘tkir burchak. cosα ni toping (sin²α + cos²α = 1 dan).

• A)0,4
• B)0,8
• C)-0,8
• D)0,6

7.cos(180° − α) ifodasini soddalashtiring.

• A)cosα
• B)sinα
• C)-sinα
• D)-cosα

8.sin(180° − α) ifodasini soddalashtiring.

• A)-cosα
• B)-sinα
• C)sinα
• D)cosα

9.Burchak 0° dan 180° gacha o‘zgarganda sinus qanday ishorani saqlaydi?

• A)Har doim musbat (yoki nolga teng)
• B)Har doim manfiy
• C)0°-90° musbat, 90°-180° manfiy
• D)O‘zgaruvchan, qat’iy ishorasiz

10.90° < α < 180° oraliqda kosinus qanday ishoraga ega?

• A)Nolga teng
• B)Musbat
• C)Aniqlanmagan
• D)Manfiy