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数学
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sina+cosa=1/5,a∈(0,π),求tana的值.
要详细过程的.一个寒假过去,.脑子不灵光了..要忘记了./.\~~`求大师..= =..
人气:370 ℃ 时间:2020-03-22 02:18:50
解答
Sina的平方加Cosa的平方等于1,从而求出sina和cosa的值,它两的比就是答案
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