2. Small diameter = large diameter-chamfer length × tanα×2

3. Large diameter = small diameter+chamfer length × tanα×2

4. Among them, (chamfer length × tanα) is used to calculate the length of a small right-angled triangle with chamfered section at the end face.

5. Chamfer 30: Tan 30 is equal to 0.577, and then calculate the chamfer length (46.14-38.2)/2/0.577 = 6.88.

6. Chamfer 45: Tan 45, chamfer length (46.14-38.2)/2/1= 3.97.

7. Chamfer 37: Tan 37, chamfer length (46. 14-38.2)/2/0.75=5.29.

8. As long as two of the three conditions of radius difference, length and angle are given, the other can be calculated according to the above formula. If the taxi driver doesn't give you an angle, let you do the math yourself. You should use arctan, an inverse trigonometric function, to create your own advanced calculator, and input the obtained value into arctan.

Extended data

Formulas of trigonometric functions daquan

1、sin 30 = 1/2 sin 45 =√2/2 sin 60 =√3/2

2、cos 30 =√3/2 cos 45 =√2/2 cos 60 = 1/2

3、tan 30 =√3/3 tan 45 = 1 tan 60 =√3

4、cot 30 =√3 cot 45 = 1 cot 60 =√3/3

5.SIN 15 =(√6-√2)/4 SIN 75 =(√6+√2)/4 COS 15 =(√6+√2)/4，COS 75 = (√ 6-√ 2)/4(。

6.SIN 18 = (√ 5- 1)/4 (this value will be more useful in high school competitions and self-recruitment, that is, half of the golden section).

7. Sine theorem: In △ABC, a/sinA = b/sin B = c/sin C = 2R (where r is the radius of the circumscribed circle of △ABC. )

Baidu Encyclopedia: Formula of Trigonometric Function

Baidu Encyclopedia: Inverse Trigonometric Function