What is the sinA if A is in standard position and (2,-7) is on it_英语解答

What is the sinA if A is in standard position and (2,-7) is on its terminal side 这段话什麼意思

人气：333 ℃　时间：2020-07-16 17:54:49

解答

如果A的终边在坐标轴的坐标（2.-7）上,则 sinA是多少
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