InterviewSolution
Saved Bookmarks
InterviewSolution
| 1. |
If in a triangle `(r)/(r_(1)) = (r_(2))/(r_(3))`, thenA. `A = 90^(@)`B. `B = 90^(@)`C. `C = 90^(@)`D. none of these |
|
Answer» Correct Answer - C `(r)/(r_(1)) = (r_(2))/(r_(3))` or `r r_(3) = r_(1) r_(2)` `rArr (Delta)/(s) (Delta)/(s-c) = (Delta)/(s-a) (Delta)/(s-b)` or `((s-a)(s-b))/(s(s-c)) = 1` `rArr tan^(2).(C)/(2) = 1 " or " tan.(C)/(2) =1` or `tan^(2).(C)/(2) = 45^(@) " or " C = 90^(@)` |
|