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10th
grade

Mathematics

0%

accuracy

4

plays

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4 years

Mathematics

10th

grade

Formulele sumei și diferenței a două funcții trigonometrice

user

4
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6 questions

6 questions

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1. Multiple Choice
15 minutes
1 pt
Adevărat sau Fals ?

sin $50\degree$ + sin $40\degree$ = $\sqrt{2}$ cos $5\degree$
Adevărat
Fals
2. Multiple Choice
15 minutes
1 pt
cos $12\degree$ - cos $48\degree$ = ?
sin $18\degree$
cos $18\degree$
sin $20\degree$
3. Multiple Choice
15 minutes
1 pt
sin $10\degree$ + sin $50\degree$ = ?
cos $10\degree$
sin $18\degree$
cos $20\degree$
$\sqrt{2}$
4. Multiple Choice
15 minutes
1 pt
2 cos $15\degree$ - 2 sin $15\degree$ = ?
cos $10\degree$
sin $18\degree$
cos $20\degree$
$\sqrt{2}$
5. Multiple Choice
15 minutes
1 pt
sin $40\degree$ + cos $70\degree$ = ?
cos $10\degree$
sin $18\degree$
cos $20\degree$
$\sqrt{2}$
6. Multiple Choice
15 minutes
1 pt
Adevărat sau Fals? $\frac{\sin\alpha+\sin\ 3\alpha}{\sin4\alpha}-\ \frac{\sin\alpha}{\sin2\alpha}\ =\ \frac{2\sin\alpha}{\sin4\alpha}$
Fals
Adevărat
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