Asosiy trigonometrik ayniyat va uning natijalari — 8-sinf Geometriya test savollari

1.Agar cosa$=\frac{2}{3}$ bo'lsa, sina ni toping.

• A)√$\frac{5}{3}$
• B)$\frac{5}{3}$
• C)√$\frac{5}{9}$
• D)$\frac{1}{3}$

2.Agar tga$=\frac{4}{3}$ bo'lsa (a — o'tkir burchak), cosa ni toping.

• A)$\frac{3}{5}$
• B)$\frac{4}{5}$
• C)$\frac{4}{3}$
• D)$\frac{9}{25}$

3.Agar sina$=\frac{12}{13}$ bo'lsa, ctga ni toping.

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

4.(1 - tg²a + tg⁴a) / cos²a ifodani soddalashtiring.

• A)1 + tg⁶a
• B)1 + tg²a
• C)1 - tg⁶a
• D)tg⁶a

5.sin⁴a + cos⁴a + 2sin²a·cos²a ifodaning qiymatini toping.

• A)1
• B)2
• C)0
• D)4

6.1 + (1 - sin²a)/sin²a ifodani soddalashtiring.

• A)1 + ctg²a
• B)1 + tg²a
• C)1 - ctg²a
• D)ctga

7.sin²a + cos²a yig'indisi har qanday o'tkir a burchak uchun doim nechaga teng?

• A)1
• B)0
• C)2
• D)90

8.tga × ctga ko'paytmasi doim nechaga teng?

• A)1
• B)0
• C)sin2a
• D)cos2a

9.1 + tg²a ifoda nimaga teng?

• A)1/cos²a
• B)1/sin²a
• C)cos²a
• D)sina×cosa

10.1 + ctg²a ifoda nimaga teng?

• A)1/sin²a
• B)1/cos²a
• C)sin²a
• D)tga×ctga