初三锐角三角形函数练习题,已知sinA=2/3 则cosA=?tanA=已知CD是RT△ABC斜边上的高 且AB=10 sin∠ACD=4/5 则CD=?已知α为锐角,若tan(90°-α)=√3 则α的度数为?若锐角A满足tanA=√3 则sin A/2=
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![初三锐角三角形函数练习题,已知sinA=2/3 则cosA=?tanA=已知CD是RT△ABC斜边上的高 且AB=10 sin∠ACD=4/5 则CD=?已知α为锐角,若tan(90°-α)=√3 则α的度数为?若锐角A满足tanA=√3 则sin A/2=](/uploads/image/z/4029399-63-9.jpg?t=%E5%88%9D%E4%B8%89%E9%94%90%E8%A7%92%E4%B8%89%E8%A7%92%E5%BD%A2%E5%87%BD%E6%95%B0%E7%BB%83%E4%B9%A0%E9%A2%98%2C%E5%B7%B2%E7%9F%A5sinA%3D2%2F3+%E5%88%99cosA%3D%3FtanA%3D%E5%B7%B2%E7%9F%A5CD%E6%98%AFRT%E2%96%B3ABC%E6%96%9C%E8%BE%B9%E4%B8%8A%E7%9A%84%E9%AB%98+%E4%B8%94AB%3D10+sin%E2%88%A0ACD%3D4%2F5+%E5%88%99CD%3D%3F%E5%B7%B2%E7%9F%A5%CE%B1%E4%B8%BA%E9%94%90%E8%A7%92%2C%E8%8B%A5tan%EF%BC%8890%C2%B0-%CE%B1%EF%BC%89%3D%E2%88%9A3+%E5%88%99%CE%B1%E7%9A%84%E5%BA%A6%E6%95%B0%E4%B8%BA%3F%E8%8B%A5%E9%94%90%E8%A7%92A%E6%BB%A1%E8%B6%B3tanA%3D%E2%88%9A3+%E5%88%99sin+A%2F2%3D)
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