Burchakning sinusi, kosinusi, tangensi va kotangensi ta'riflari — 9-sinf Algebra test savollari

1.sin$\alpha =\frac{3}{5}$ va α II chorakda bo'lsa, cosα ni toping.

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

2.cos$\alpha =-\frac{5}{13}$ va α III chorakda bo'lsa, sinα ni toping.

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

3.tg$\alpha =\frac{3}{4}$ va α I chorakda bo'lsa, sinα ni toping.

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

4.ctgα = -1 va α II chorakda. α ning qiymatini (0 dan 2π gacha) toping.

• A)$\frac{3\pi }{4}$
• B)$\frac{\pi }{4}$
• C)$\frac{5\pi }{4}$
• D)$\frac{7\pi }{4}$

5.sin$\alpha =\frac{1}{2}$ va cosα < 0. α ning qiymatini (0°-360°) toping.

• A)150°
• B)30°
• C)210°
• D)330°

6.sin30° ning qiymatini toping.

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

7.cos60° ning qiymatini toping.

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

8.tg45° ning qiymatini toping.

• A)1
• B)0
• C)√3
• D)√$\frac{3}{3}$

9.sin90° ning qiymatini toping.

• A)1
• B)0
• C)-1
• D)$\frac{1}{2}$

10.cos0° ning qiymatini toping.

• A)1
• B)0
• C)-1
• D)$\frac{1}{2}$