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AP and TS EAMCET Engineering Model Paper 4
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© examsnet.com
Question : 56
Total: 160
If a, b, c are the sides of ∆ABC inscribed in given circle then
δ
a
cos
A
+
δ
b
cos
B
+
δ
c
cos
C
=
0
1
∏
2
∏
Validate
Solution:
a = 2R sinA, b = 2R sinB, c = 2R sinC
δ
a
cos
A
+
δ
b
cos
B
+
δ
c
cos
C
=
0
© examsnet.com
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