Saved Bookmarks
| 1. |
13- Prove that —mM8Mm— = ————— 4 2cotf+Cosecd Coth—cosecO |
|
Answer» r.h.s=sinA/cotA+cosecA*cotA- cosecA/cotA-cosecA=sinA(cotA-cosecA)/cot²A-cosec²A=sinA* cotA- sinA.cosecA=sinA.cosA/sinA-1=cosA-1 l.h.s=2+ sinA(cotA+ cosecA)/cot²A-cosec²A=2+ sinA.cotA+ sinA.cosecA=2+sinA.cosA/sinA+1=2+cosA-1=cosA-1r.h.s=l.h.s |
|