
DB10 L2
Authored by Mỹ Trần
Mathematics
10th Grade
Used 2+ times

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28 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Cho tam giác ABC vuông tại A có góc nhọn C bằng α. Khi đó cosα bằng:
cosα = AB/BC
cosα = AC/BC
cosα = AB/AC
cosα = AC/AB
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Cho α là góc nhọn bất kì. Khẳng định đúng là:
cosα = 1/tanα
sinα = 1/tanα
cotα = 1/tanα
cotα = 1/sinα
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Cho tam giác ABC vuông tại C có AC = 1cm, BC = 2cm. Tính tỉ số lượng giác sinB, cosB.
sinB = 1/√3; cosB = 2√3/3
sinB = √5/5; cosB = 2√5/5
sinB = 1/2; cosB = 2/√5
sinB = 2√5/5; cosB = √5/5
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Cho tam giác ABC vuông tại C có AC = 1,2cm, BC = 0,9cm. Tính các tỉ số lượng giác sinB, cosB.
sinB = 0,6; cosB = 0,8
sinB = 0,8; cosB = 0,6
sinB = 0,4; cosB = 0,8
sinB = 0,6; cosB = 0,4
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Cho tam giác ABC, vuông tại A có AB = 3; AC = 4. Chọn khẳng định sai?
sinB = 4/5
cosB = 3/5
tanB = 4/3
cotB = 4/5
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Cho tam giác MNP vuông tại N. Hệ thức nào sau đây là đúng?
MN = MP.sin P
MN = MP.cos P
MN = MP.tan P
MN = MP.cot P
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Cho hình vẽ (tam giác ABC vuông tại A, cạnh huyền BC=a, cạnh AB=c, cạnh AC=b). Hệ thức nào dưới đây đúng?
c = a.sinB
c = a.sinC
c = a.cosB
c = a.tanB
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