HỆ THỨC LƯỢNG TRONG TAM GIÁC - NHÓM 7
Authored by Minh Thanh
Mathematics
10th Grade
Used 1+ times
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10 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
3.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
11
12
13
14
4.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
5.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
Cho tam giác ABC có BC=a, AC=b, AB=c? Giá trị cosA được tính bằng?
cosA=(b2+c2-a2)/2bc
cosA=(a2+c2-b2)/2ac
cosA=(a2+b2-c2)/2ab
cosA=(b2+c2+a2)/2bc
6.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Cho tam giác ABC có AB=8cm, AC=18cm và có diện tích bằng 64cm2. Giá trị sinA là:
0,866
3/8
4/5
8/9
7.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Cho tam giác ABC có AB=4cm, BC=7cm, CA=9cm. Giá trị cosA là:
2/3
1/3
-2/3
1/2
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