Формулы двойного и половинного аргумента

Формулы двойного и половинного аргумента

10th Grade

20 Qs

quiz-placeholder

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Формулы двойного и половинного аргумента

Формулы двойного и половинного аргумента

Assessment

Quiz

Mathematics

10th Grade

Practice Problem

Hard

Created by

Светлана Шиманкова

Used 38+ times

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20 questions

Show all answers

1.

MULTIPLE SELECT QUESTION

20 sec • 1 pt

 cos2x\cos2x  

 cos2xsin2x\cos^2x-\sin^2x  

 sin2xcos2x\sin^2x-\cos^2x  

 2cos2 x12\cos^{2\ }x-1  

 12cos2x1-2\cos^2x  

2.

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

 sin2x\sin2x  

 cos2xsin2x\cos^2x-\sin^2x  

1

 2sinxcosx2\sin x\cos x  

 sinxcosx\sin x\cos x  

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

 sin 4x\sin\ 4x  

 4sinxcosx4\sin x\cos x  

 2sin2xcos2x2\sin2x\cos2x  

 2sin8xcos8x2\sin8x\cos8x  

 cos2 2xsin2 2x\cos^2\ 2x-\sin^2\ 2x  

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

 tg 5xtg\ 5x  

 1cos10x1+cos10x\frac{1-\cos10x}{1+\cos10x}  

 2tg 2,5x1tg2 2,5x\frac{2tg\ 2,5x}{1-tg^2\ 2,5x}  

 tg 2,5x1tg2 2,5x\frac{tg\ 2,5x}{1-tg^2\ 2,5x}  

 1+cos10x1cos10x\frac{1+\cos10x}{1-\cos10x}  

5.

MULTIPLE SELECT QUESTION

45 sec • 1 pt

 cos2 4x\cos^2\ 4x  

 (cos22x sin2 2x)2\left(\cos^22x\ -\sin^2\ 2x\right)^2  

 1cos 2x2\frac{1-\cos\ 2x}{2}  

 1+sin8x2\frac{1+\sin8x}{2}  

 1+cos8x2\frac{1+\cos8x}{2}  

6.

MULTIPLE SELECT QUESTION

45 sec • 1 pt

 tg 29xtg\ ^29x  

 1+cos4,5x1cos4,5x\frac{1+\cos4,5x}{1-\cos4,5x}  

 2tg 18x1tg2 18x\frac{2tg\ 18x}{1-tg^2\ 18x}  

 1cos18x1+cos18x\frac{1-\cos18x}{1+\cos18x}  

 (2tg 4,5x1tg2 4,5x)2\left(\frac{2tg\ 4,5x}{1-tg^2\ 4,5x}\right)^2  

7.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

 cos 15°\cos\ 15^{\degree}  

 1+cos30°2\sqrt{\frac{1+\cos30^{\degree}}{2}}  

 ±2+34\pm\sqrt{\frac{2+\sqrt{3}}{4}}  

 cos230°sin230°\cos^230^{\degree}-\sin^230^{\degree}  

 12\frac{1}{2}  

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