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Authored by Ly Hân
Mathematics
11th Grade

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7 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Định lí sin: Trong tam giác ABC với BC = a, CA = b, AB = c, ta có:
a/sinA= 2R
b/sinB = R
a/cosA = 2R
a/sinA = R
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Tích vô hướng có công thức :
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Hệ quả định lí côsin:
4.
FILL IN THE BLANK QUESTION
1 min • 1 pt
hai góc phụ nhau thì các tỉ số lượng giác của chúng :
tan(90° – x) = ___
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Mối liên hệ giữa các giá trị lượng giác của hai góc bù nhau
Với mọi góc α thoả mãn 0° ≤ α ≤ 180°, ta luôn có:
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Mốt là gì : Giá trị có tần số nhỏ nhất được gọi là mốt của mẫu số liệu và kí hiệu là Mo.
Đúng
Sai
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