Quiz about 任意角的三角函數--練習1

Question 1

$$\sin180^0=?$$

Accepted Answer

0

Answer

1

Answer

-1

Question 2

$$\cos180^0=?$$

Accepted Answer

-1

Answer

0

Answer

1

Question 3

$$\cos270^0=?$$

Accepted Answer

0

Answer

1

Answer

-1

Question 4

$$\cos120^0=?$$

Accepted Answer

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

Answer

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

Answer

$$\frac{\sqrt[]{3}}{2}$$

Answer

$$-\frac{\sqrt[]{3}}{2}$$

Question 5

$$ an225^0=?$$

Accepted Answer

1

Answer

-1

Question 6

tanx=

Accepted Answer

$$\frac{\sin x}{\cos x}$$

Answer

$$\sin x imes\cos x$$

Answer

$$\sin x+\cos x$$

Answer

$$\sin x-\cos x$$

Question 7

tanx=

Accepted Answer

$$\frac{\sin x}{\cos x}$$

Answer

$$\sin x imes\cos x$$

Answer

$$\sin x+\cos x$$

Answer

$$\sin x-\cos x$$

Question 8

sinx=

Accepted Answer

$$\frac{1}{\csc x}$$

Answer

$$\frac{1}{\cos x}$$

Answer

$$\frac{1}{\sec x}$$

Answer

$$\frac{1}{ an x}$$

Question 9

$$ an^2x+1=$$

Accepted Answer

$$\sec^2x$$

Answer

$$\csc^2x$$

Answer

$$\cos^2x$$

Answer

$$\cot^2x$$

Question 10

cosx=

Accepted Answer

$$\frac{1}{\sec x}$$

Answer

$$\frac{1}{ an x}$$

Answer

$$\frac{1}{\cot}$$

Answer

$$\frac{1}{\csc x}$$

Question 11

tanx=

Accepted Answer

$$\frac{1}{\cot x}$$

Answer

$$\frac{1}{\sin x}$$

Answer

$$\frac{1}{\cos x}$$

Answer

$$\frac{1}{\csc x}$$

Question 12

Accepted Answer

Option B is correct

Answer

A.

Answer

C.

Question 13

Accepted Answer

Option A is correct

Answer

B.

Answer

C.

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