1.已知直线Y=3X,求该直线与X轴夹角(锐角)的正弦值.2.在△ABC中,AB=10,BC=26,AD是BC边上的高,AD=6,求CD的长与sin C.
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![1.已知直线Y=3X,求该直线与X轴夹角(锐角)的正弦值.2.在△ABC中,AB=10,BC=26,AD是BC边上的高,AD=6,求CD的长与sin C.](/uploads/image/z/11953763-35-3.jpg?t=1.%E5%B7%B2%E7%9F%A5%E7%9B%B4%E7%BA%BFY%3D3X%2C%E6%B1%82%E8%AF%A5%E7%9B%B4%E7%BA%BF%E4%B8%8EX%E8%BD%B4%E5%A4%B9%E8%A7%92%28%E9%94%90%E8%A7%92%29%E7%9A%84%E6%AD%A3%E5%BC%A6%E5%80%BC.2.%E5%9C%A8%E2%96%B3ABC%E4%B8%AD%2CAB%3D10%2CBC%3D26%2CAD%E6%98%AFBC%E8%BE%B9%E4%B8%8A%E7%9A%84%E9%AB%98%2CAD%3D6%2C%E6%B1%82CD%E7%9A%84%E9%95%BF%E4%B8%8Esin+C.)
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