a + b+ c=pi, show that sinA/2 + sinB/2+ sinC/2=1 + 4sin(B + C)/4*sin(A+ C)/4*sin(A+ B)/4
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But tomorrow i answer you
So sorry sorry sorry sorry sorry sorry sorry sorry sorry please please please please please please please please please please please please please please tomorrow i will surely answer you 3,4,5 so please please give me time friend i need to think but surely i answer you
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