Saved Bookmarks
| 1. |
If `DeltaABC,` if `(c+a)/12=(a+b)/14=(b+c)/18`, then find vaue of `(7r_(1)-r_(2))/(11r)` is |
|
Answer» `(c+a)/(12)=(a+b)/(14)=(b+c)/(18)=(s)/(11)` `b+c=(18)/(11)s` `implies2s-a=(18)/(11)s` `impliess-a=(7)/(11)s` `r_(1)=(Delta)/(s-a)=(11Delta)/(7s)=(11)/(7)r` `a+c=(12s)/(11)` `2s-b=(12s)/(11)` `r_(r)=(Delta)/(s-b)=(11Delta)/(s)=11r` `implies(7r_(1)-r_(2))/(11)=(11r-11r)/(11r)=0` |
|