练习闪卡: 高考数学：解三角形 | Zestly

Question 1

正弦定理

Accepted Answer

$\frac{a}{\sin A} = \frac{b}{\sin B} = \frac{c}{\sin C} = 2R$

Question 2

余弦定理

Accepted Answer

$a^2 = b^2 + c^2 - 2bc \cos A$

Question 3

三角形面积公式

Accepted Answer

$S = \frac{1}{2}ab \sin C = \frac{1}{2}bc \sin A = \frac{1}{2}ac \sin B$

Question 4

海伦公式

Question 5

正弦定理变形

Question 6

余弦定理求角

Question 7

三角形内角和

Question 8

射影定理

Question 9

三角形全等判定

Question 10

正弦定理适用范围

Question 11

余弦定理适用范围