Algebra 3-chsb

Soddalashtiring. sin(π/2 + α) cos(π/2 − β) + sin(α−β)

• sinαcosβ

• sinβcosα

• sinαsinβ

• cosαcosβ

tgα=−7/24 va π/2<α<π boʻlsa, sin2α ni hisoblang.

• 336/625

• −336/625

• −121/125

• 121/125

cosα=−0,6 va π<α<3π/2 boʻlsa, tg2α ni hisoblang.

• −24/7

• 24/7

• 7/24

• -7/24

Ifodani soddalashtiring: (sin(π−4α) + cos(π/2 + 2α)) /(sin(3π/2 − 2α) − cos(3π + 4α))

• ctgα

• −ctg3α

• −ctgα

• ctg3α

Ifodani soddalashtiring: (1−sinα−cos2α)/(cosα−sin2α)

• −ctgα

• tgα

• −tgα

• ctgα

Arifmetik progressiyada a₅=41 va a₁₀=26. Bu progressiya 21-hadini toping.

• −7

• 7

• −4

• −10

Arifmetik progressiya aₙ=20−4n formula bilan berilgan. Bu progressiya dastlabki n ta hadi yigʻindisini toping.

• 18n−4n²

• 18n−2n²

• 20n−2n²

• 20n−4n²

Oʻsuvchi geometrik progressiyada b₅=18 va b₇=162 ga teng. Bu progressiya 2 – hadini toping.

• 0,(3)

• 0,(6)

• 1/2 3

• 2/2 3

bₙ=96∙0,5^n-2 formula bilan berilgan geometrik progressiyaning dastlabki 7 ta hadi yigʻindisini toping.

• 372

• 366

• 368

• 381

Geometrik progressiyada b₂=−1; q=−5 va Sₙ=2604,2 boʻlsa, n ni toping.

• 7

• 6

• 8

• 9