CBSE Class 11-science Answered
If A and B be the greatest and least angles of a triangle whose sides
are in A.P, then
1)4(1-sins)(1-sinB)=cosA+cosB
2)4(1-cosA)(1-cosB)=cosA+cosB
3)4(1+cosA)(1+cosB)=cosA+cosB
4)None of these
Asked by Sunil Soni | 07 Dec, 2015, 11:46: PM
Expert Answer
Answered by satyajit samal | 08 Dec, 2015, 07:11: PM