Qo'shish formulalari — 9-sinf Algebra test savollari

1.sin$\alpha =\frac{3}{5}$, cos$\beta =\frac{5}{13}$(ikkalasi ham I chorakda). sin(α+β) ni toping.

• A)$\frac{63}{65}$
• B)$\frac{33}{65}$
• C)$\frac{56}{65}$
• D)$\frac{16}{65}$

2.cos$\alpha =\frac{4}{5}$, sin$\beta =\frac{5}{13}$(ikkalasi ham I chorakda). cos(α-β) ni toping.

• A)$\frac{63}{65}$
• B)$\frac{33}{65}$
• C)$\frac{16}{65}$
• D)$\frac{56}{65}$

3.sin75° ni sin(45°+30°) sifatida hisoblang.

• A)$\frac{\surd 6+\surd 2}{4}$
• B)$\frac{\surd 6-\surd 2}{4}$
• C)$\frac{\surd 2+\surd 3}{2}$
• D)√$\frac{6}{4}$

4.cos15° ni cos(45°-30°) sifatida hisoblang.

• A)$\frac{\surd 6+\surd 2}{4}$
• B)$\frac{\surd 6-\surd 2}{4}$
• C)$\frac{\surd 3+\surd 2}{2}$
• D)√$\frac{6}{4}$

5.tg75° ni tg(45°+30°) sifatida hisoblang.

• A)2+√3
• B)2-√3
• C)1+√3
• D)√3

6.sin(α+β) formulasini yozing.

• A)sinαcosβ + cosαsinβ
• B)sinαcosβ - cosαsinβ
• C)cosαcosβ - sinαsinβ
• D)cosαcosβ + sinαsinβ

7.cos(α-β) formulasini yozing.

• A)cosαcosβ + sinαsinβ
• B)cosαcosβ - sinαsinβ
• C)sinαcosβ + cosαsinβ
• D)sinαcosβ - cosαsinβ

8.sin90° ni sin(30°+60°) sifatida hisoblang.

• A)1
• B)0
• C)$\frac{1}{2}$
• D)√$\frac{3}{2}$

9.cos90° ni cos(30°+60°) sifatida hisoblang.

• A)0
• B)1
• C)-1
• D)$\frac{1}{2}$

10.cos(α+β) formulasini yozing.

• A)cosαcosβ - sinαsinβ
• B)cosαcosβ + sinαsinβ
• C)sinαcosβ + cosαsinβ
• D)sinαsinβ - cosαcosβ