CBSE Class 11-science Answered
Internal bisector of angle A of a triangle ABC meets the side BC at D.
A line drawn through D perpendicular to AD intersects the AC at E
and the side AB at F. If a,b,c represent the sides of triangle ABC, then
1)AE is the H. M.of b and 2c. 2)AD=2bc/b+c cos^2 A/2
3)EF=4bc/b+c sin A/2. 4)None of these
Asked by Sunil Soni | 07 Dec, 2015, 11:03: PM
Expert Answer
Answered by satyajit samal | 08 Dec, 2015, 12:27: PM