Saved Bookmarks
| 1. |
In any ΔABC, prove that :a (cos B+cosC−1)+b (cosC+cosA−1)+c (cosA+cosB−1)=0 |
|
Answer» In any ΔABC, prove that :a (cos B+cosC−1)+b (cosC+cosA−1)+c (cosA+cosB−1)=0 |
|