코사인 법칙(비교)
| r4 vs r5 | ||
|---|---|---|
| ... | ... | |
| 5 | 5 | [math(c=a\cos B+b\cos A)] |
| 6 | 6 | == [anchor(2)] 제 2 코사인 법칙 == |
| 7 | 7 | [math(a^2=b^2+c^2-2bc\cos A)] |
| 8 | ||
| 9 | [math(b^2=c^2+a^2-2ca\cos B)] | |
| 10 | ||
| 11 | [math(c^2=a^2+b^2-2ab\cos C)] | |
| 12 | ||
| 13 | [math(\cos A=\dfrac{b^2+c^2-a^2}{2bc})] | |
| 14 | ||
| 15 | [math(\cos B=\dfrac{c^2+a^2-b^2}{2ca})] | |
| 16 | ||
| 17 | [math(\cos A=\dfrac{a^2+b^2-c^2}{2ab})] | |
| 18 |