如图,在Rt△ABC中,∠ACB=90°,CD垂直AB于D,若BD:AD=1:3,求tan∠BCD我要过程。图昰这样旳:http://sz2.photo.store.qq.com/http_imgload.cgi?/rurl4_b=d39dfd36d7e7b3f4cc3be3eb18564488cc09aa21406c94d65e83d1253618e1d69097202f296606039939475
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![如图,在Rt△ABC中,∠ACB=90°,CD垂直AB于D,若BD:AD=1:3,求tan∠BCD我要过程。图昰这样旳:http://sz2.photo.store.qq.com/http_imgload.cgi?/rurl4_b=d39dfd36d7e7b3f4cc3be3eb18564488cc09aa21406c94d65e83d1253618e1d69097202f296606039939475](/uploads/image/z/2391532-52-2.jpg?t=%E5%A6%82%E5%9B%BE%2C%E5%9C%A8Rt%E2%96%B3ABC%E4%B8%AD%2C%E2%88%A0ACB%3D90%C2%B0%2CCD%E5%9E%82%E7%9B%B4AB%E4%BA%8ED%2C%E8%8B%A5BD%3AAD%3D1%3A3%2C%E6%B1%82tan%E2%88%A0BCD%E6%88%91%E8%A6%81%E8%BF%87%E7%A8%8B%E3%80%82%E5%9B%BE%E6%98%B0%E8%BF%99%E6%A0%B7%E6%97%B3%EF%BC%9Ahttp%3A%2F%2Fsz2.photo.store.qq.com%2Fhttp_imgload.cgi%3F%2Frurl4_b%3Dd39dfd36d7e7b3f4cc3be3eb18564488cc09aa21406c94d65e83d1253618e1d69097202f296606039939475)
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