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在Rt△ABC中,∠C=90°,a,b,c分别是∠A,∠B,∠C的对边,由下列条件解直角三角形:已知b=15,cosA=,求a.
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教案备课库《八(1)年级数学作业24.4.1解直角三角形作业(1)》真题及答案
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