Saved Bookmarks
| 1. |
Prove that tan50=tan40+2tan10 |
|
Answer» Nice ?? tan50=tan(40+10)Now,tan(40+10) =(tan40+tan10)/1-tan40tan10tan50-tan50tan40tan10 = tan 40 + tan10(*tan40=cot50)tan50-tan10=tan40+tan10tan50 = tan40+2tan10 hence proved |
|