In ΔABC , prove that sin (A+B/2) = cos c/2
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Step-by-step explanation:
A+B+C = 180
A+B = 180-C
(A+B)/2 = 90-C/2
Sin ((A+B)/2) = Sin (90-C/2)
= Cos(C/2)
Hence proved.
Hope you are satisfied with the solution
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