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ôn tập công thức LG

Authored by Thắng Chiến

Mathematics

10th Grade

Used 16+ times

ôn tập công thức LG
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10 questions

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1.

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

 sin2x+cos2x=?\sin^2x+\cos^2x=?  

0

1

-1

2

2.

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

 sin2x=?\sin2x=?  

sinxcosx

4sinxcosx

2sinxcosx

 12sinxcosx\frac{1}{2}\sin x\cos x  

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

 sin(x+π3)=?\sin\left(x+\frac{\pi}{3}\right)=?  

 sinxcos(π3)+cosxsin(π3)\sin x\cos\left(\frac{\pi}{3}\right)+\cos x\sin\left(\frac{\pi}{3}\right)  

 sinxcos(π3)cosxsin(π3)\sin x\cos\left(\frac{\pi}{3}\right)-\cos x\sin\left(\frac{\pi}{3}\right)  

 cosxcos(π3)+sinxsin(π3)\cos x\cos\left(\frac{\pi}{3}\right)+\sin x\sin\left(\frac{\pi}{3}\right)  

 cosxcos(π3)sinxsin(π3)\cos x\cos\left(\frac{\pi}{3}\right)-\sin x\sin\left(\frac{\pi}{3}\right)  

4.

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

tanx.cotx=?

0

2

1

-1

5.

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

cotx=?

sinxcosx\frac{\sin x}{\cos x}

1+cotx1+\cot x

1tanx1-\tan x

cosxsinx\frac{\cos x}{\sin x}

6.

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

 1sin2x=?\frac{1}{\sin^2x}=?  

 1+cosx1+\cos x  

 1+cotx1+\cot x  

 1+cot2x1+\cot^2x  

 1+tan2x1+\tan^2x  

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

 1+tan2x=?1+\tan^2x=?  

 1cos2x\frac{1}{\cos^2x}  

 1sin2x\frac{1}{\sin^2x}  

 sin2x\sin^2x  

 cos2x\cos^2x  

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