题目

角 的终边经过点 且 ,则 =_____________. 答案:  【详解】∵角α的终边经过点P(x,4),且, ∴cosα==,即x=0,x=3或x=﹣3, ∴P(±3,4), ∴sinα=,— _______ today?— It's fine. [     ]A. How are youB. What's the weather like C. Who is on duty D. What can I do for you
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