Trigonometrik ayniyatlar — 10-sinf Algebra test savollari

1.sin$\alpha =\frac{3}{5}$ va α II chorakda (90°<α<180°) yotsa, cosα ni toping.

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

2.sinα=0,6 va cosα=0,8 bo'lsa, sin2α ni toping.

• A)0,96
• B)0,48
• C)1,4
• D)0,36

3.sin$\alpha =\frac{1}{3}$ bo'lsa, cos2α ni toping.

• A)$\frac{7}{9}$
• B)$-\frac{7}{9}$
• C)$\frac{1}{9}$
• D)$\frac{8}{9}$

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

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

5.(1-cos2x)/sin2x ifodani soddalashtiring.

• A)tgx
• B)ctgx
• C)2tgx
• D)sinx

6.sin²x+cos²x ifoda nimaga teng?

• A)1
• B)0
• C)2
• D)sin2x

7.1+tg²x ifoda nimaga teng (cosx≠0)?

• A)1/cos²x
• B)1/sin²x
• C)1/tgx
• D)cos²x

8.sin(90°-α) ifodani soddalashtiring.

• A)cosα
• B)-cosα
• C)sinα
• D)-sinα

9.cos(180°-α) ifodani soddalashtiring.

• A)-cosα
• B)cosα
• C)sinα
• D)-sinα

10.sin2α uchun to'g'ri formulani ko'rsating.

• A)2sinα·cosα
• B)sin²α-cos²α
• C)sinα+cosα
• D)2cos²α-1