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10th - 11th Grade

25 Qs

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Assessment

Quiz

Mathematics

10th - 11th Grade

Practice Problem

Easy

Created by

Dương Hương

Used 4+ times

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25 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

45 sec • 4 pts

 tan2x=...\tan2x=...  

 sinxcosx\frac{\sin x}{\cos x}  

 sinacosa\frac{\sin a}{\cos a}  

 sin2xcos2x\frac{\sin2x}{\cos2x}  

 sin2acos2a\frac{\sin2a}{\cos2a}  

2.

MULTIPLE CHOICE QUESTION

45 sec • 4 pts

Chọn đẳng thức đúng ?

sin2xcos2x=1\sin^2x-\cos^2x=1

sin2x+cos2x=1\sin^2x+\cos^2x=1

sin2x=1+cos2x\sin^2x=1+\cos^2x

cos2x=sin2x1\cos^2x=\sin^2x-1

3.

MULTIPLE CHOICE QUESTION

45 sec • 4 pts

Công thức nào ĐÚNG?

 cos(a+b)=cosa.cosb+sina.sinb\cos\left(a+b\right)=\cos a.\cos b+\sin a.\sin b 

 cos(a+b)=cosa.cosbsina.sinb\cos\left(a+b\right)=\cos a.\cos b-\sin a.\sin b 

 cos(a+b)=sina.cosb+cosa.sinb\cos\left(a+b\right)=\sin a.\cos b+\cos a.\sin b 

 cos(a+b)=sina.cosbcosa.sinb\cos\left(a+b\right)=\sin a.\cos b-\cos a.\sin b 

4.

MULTIPLE CHOICE QUESTION

45 sec • 4 pts

Chọn câu đúng ?

 sin(ab)=cosa.cosbsina.sinb\sin\left(a-b\right)=\cos a.\cos b-\sin a.\sin b  

 sin(ab)=cosa.cosb+sina.sinb\sin\left(a-b\right)=\cos a.\cos b+\sin a.\sin b 

sin(ab)=sina.cosbcosa.sinb\sin\left(a-b\right)=\sin a.\cos b-\cos a.\sin b

 sin(ab)=sina.cosb+cosa.sinb\sin\left(a-b\right)=\sin a.\cos b+\cos a.\sin b 

5.

MULTIPLE CHOICE QUESTION

45 sec • 4 pts

 sin4a=....\sin4a=....  

 2.sina.cosa2.\sin a.\cos a  

 2.sin2a.cos2a2.\sin2a.\cos2a  

 2.sin4a.cos4a2.\sin4a.\cos4a  

 1cos24a1-\cos^24a  

6.

MULTIPLE CHOICE QUESTION

45 sec • 4 pts

Chọn câu SAI ?

cos2a=2cos2a1\cos2a=2\cos^2a-1

cos2a=12sin2a\cos2a=1-2\sin^2a

cos2a=sin2acos2a\cos2a=\sin^2a-\cos^2a

cos2a=cos2asin2a\cos2a=\cos^2a-\sin^2a

7.

MULTIPLE CHOICE QUESTION

45 sec • 4 pts

 cos6acos2a=....\cos6a-\cos2a=....  

 2cos4a.cos2a2\cos4a.\cos2a  

 2cos8a.cos4a2\cos8a.\cos4a  

 2sin8a.sin4a2\sin8a.\sin4a  

 2sin4a.sin2a-2\sin4a.\sin2a  

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