plss given me answer
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refer to the above attachment for solution.
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Step-by-step explanation:
A + B + C = π
R.H.S = cos(A/2)
[substituting the value of A
from above equation]
= cos [(π - B+C)/2]
= cos [ π/2 - (B+C)/2]
= sin [(B+C)/2]
= L.H.S
Hence proved
hope it helps uh......
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