Quiz about Тригонометрия

Question 1

$$\sin\ \alpha=$$

Accepted Answer

$$\sinα=\frac{BC}{AB}$$

Answer

$$\sinα=\frac{AB}{BC}$$

Answer

$$\sinα=\frac{AC}{AB}$$

Answer

$$\sinα=\frac{BC}{AC}$$

Question 2

$$\cos\ \beta=$$

Accepted Answer

$$\cosβ=\frac{BC}{AB}$$

Answer

$$\cosβ=\frac{AB}{AC}$$

Answer

$$\cosβ=\frac{AC}{AB}$$

Answer

$$\cosβ=\frac{AB}{BC}$$

Question 3

$$tg\left(-\alpha\right)=$$

Accepted Answer

$$-tg(α)$$

Answer

$$-tg(-α)$$

Answer

$$\operatorname{ctg}(α)$$

Answer

Question 4

$$\cos\left(-\alpha\right)=$$

Accepted Answer

$$\cos(\alpha)$$

Answer

$$-\cos(\alpha)$$

Answer

$$\sin(\alpha)$$

Answer

$$ an(\alpha)$$

Question 5

$$tg\ \alpha=$$

Accepted Answer

$$\frac{\sin\ \alpha}{\cos\ \alpha}$$

Answer

$$\frac{\cos\ \alpha}{\sin\ \alpha}$$

Answer

$$\frac{1}{\sin\ \alpha}$$

Answer

$$\frac{1}{\cos\ \alpha}$$

Question 6

$$\operatorname{ctg}\ \alpha=$$

Accepted Answer

$$\frac{\cos\ \alpha}{\sin\ \alpha}$$

Answer

$$\frac{1}{\sin\ \alpha}$$

Answer

$$\frac{\sin\ \alpha}{\cos\ \alpha}$$

Answer

$$\frac{1}{\cos\ \alpha}$$

Question 7

$$\sin\left(360\degree+\alpha\right)=$$

Accepted Answer

$$\sin(\alpha)$$

Answer

$$\cos\ \alpha$$

Answer

0

Answer

$$\sin(180\degree+\alpha)$$

Question 8

$$\operatorname{ctg}\left(180\degree+\alpha\right)=$$

Accepted Answer

$$\operatorname{ctg}\ \alpha$$

Answer

$$\cos\ \alpha$$

Answer

0

Answer

$$tg\ \alpha$$

Question 9

$$\cos\left(360\degree+\alpha\right)=$$

Accepted Answer

$$\cos\ \alpha$$

Answer

$$\sin\ \alpha$$

Answer

$$-\sin\ \alpha$$

Answer

$$tg\ \alpha$$

Question 10

$$\sin\left(-\alpha\right)=$$

Accepted Answer

$$-\sin(\alpha)$$

Answer

$$ an(-\alpha)$$

Answer

$$-\cos(\alpha)$$

Answer

$$\sin(\alpha)$$

Question 11

$$\cos\ \frac{3\pi}{4}=$$

Accepted Answer

$$-\frac{\sqrt{2}}{2}$$

Answer

$$\frac{\sqrt{2}}{2}$$

Answer

$$-\frac{1}{2}$$

Answer

Question 12

$$tg\left(180\degree+\alpha\right)=$$

Accepted Answer

$$tg\ \alpha$$

Answer

$$\cos\ \alpha$$

Answer

$$\operatorname{ctg}\ \alpha$$

Answer

0

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