TỈ SỐ LƯỢNG GIÁC CỦA GÓC NHỌN
Authored by Trung Mạnh
Mathematics
9th Grade
Used 11+ times
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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
sinα + cosα = 1
sin2α + cos2α = 1
sin3α + cos3α = 1
sinα − cosα = 1
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Cho α và β là hai góc nhọn bất kì thỏa mãn α + β = 90o. Khẳng định nào sau đây là đúng?
tanα = sinβ
tanα = cotβ
tanα = cosβ
tanα = tanβ
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Khẳng định nào sau đây là đúng?
Cho hai góc phụ nhau thì:
sin góc này bằng cosin góc kia.
sin hai góc bằng nhau
tan góc này bằng cosin góc kia
cotan góc này bằng sin góc kia
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Cho tam giác ABC vuông tại C có BC = 1,2cm, AC = 0,9cm.
Tính các tỉ số lượng giác sinB và cosB.
sin B = 0,6;
cos B = 0,8
sin B = 0,8;
cos B = 0,6
sin B = 0,4;
cos B = 0,8
sin B = 0,6;
cos B = 0,4
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