anh tiến loạt dzai
Authored by jeth lm
Mathematics
1st Grade
Used 4+ times
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28 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
tanα. cotα =
sinα/2
1/2
sinαcosα
1
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
1/cotα
1/cot (-α)
1/cot2α
1/2cotα
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
1 + cot2α =
1/cos2α
1/tan2α
1/sina
1/sin2α
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
cos (a-b) =
cosa.cosb - sina.sinb
cosb.cosa - sinb.sin2a
cosa.cosb + sina.sinb
cosa.cosb - 2cosa.sina
5.
FILL IN THE BLANKS QUESTION
1 min • 1 pt
sin(a-b)
(a)
6.
FILL IN THE BLANKS QUESTION
1 min • 1 pt
sin(a+b)
(a)
7.
FILL IN THE BLANKS QUESTION
1 min • 1 pt
cos (a+b)
(a)
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