作业帮已知0＜a＜π,化简(1+sina+cosa)·[sin(a/2)-cos(a/2)] / sqrt(2+2cosa)
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已知0＜a＜π,化简(1+sina+cosa)·[sin(a/2)-cos(a/2)] / sqrt(2+2cosa)
已知0＜a＜π,化简(1+sina+cosa)·[sin(a/2)-cos(a/2)] / sqrt(2+2cosa)
已知0＜a＜π,化简(1+sina+cosa)·[sin(a/2)-cos(a/2)] / sqrt(2+2cosa)
[(1+sina+cosa)(sin(a/2)-cos(a/2))]/√(2-2cosa) (0