
công thức lượng giác
Authored by Hanamzuki Skylar
Mathematics
11th Grade
Used 50+ times

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10 questions
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1.
MULTIPLE SELECT QUESTION
30 sec • 1 pt
sin(a+b)=?
sina.sinb + cosa.cosb
sina.cosb + cosa.sinb
sina.cosb - cosa.sinb
sina.sinb - cosa.cosb
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
cos(a-b)=?
cosa.sinb - sina.cosb
cosa.sinb - sina.cosb
cosa.cosb + sina.sinb
cosa.sinb + sina.cosb
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
2sina.cosa=
sin2a
cos2a
tan2a
cot2a
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
cos2a=?
2sin2a-1
1-2cos2a
1-sin2a
cos2a-sin2a
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
cos a +cosb=?
2cos cos
2sin cos
2cos sin
2sin sin
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
(sin(a+b)+sin(a-b))=?
sina.sinb
cosa.sinb
sina.cosb
cosa.cosb
7.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
sina + cos a =?
sin( x - )
sin( x + )
cos( x - )
cos( x + )
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