October 2018 1 24 Report
Jika A+B+C= \pi , maka  \frac{sin( \frac{1}{2}A)+ cos ( \frac{1}{2}(B+C)+A) }{sin(B+C+ \frac{1}{2}A) } =
A. -2
B. -1
C. 0
D. 1
E. 2
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