25/10/2023 - Ôn tập giữa kỳ

Quiz
•
Mathematics
•
9th Grade
•
Hard
Voidy Voidy
Used 1+ times
FREE Resource
15 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Với x, y là số đo các góc nhọn. Chọn nội dung sai trong các câu sau:
sin2x + cos2y = 1
tan v . cot v = 1
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Cho ΔABC vuông tại A ,đường cao AH, ta có
AC2 = AB.BC
AB2 = AC.HB
AH2 = BH.HC
AB.AH = AC.BC
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Giá trị của biểu thức √(-11)2 bằng:
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Căn bậc hai số học của 4 là
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Chọn khẳng định đúng:
cot720 = cot180
sin670 = sin230
cos250 = sin650
tan310 = cot310
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
x < 5
x > 5
x = 5
với mọi x
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