分不多,不一定要全做 1.已知(1+tanα)/(1-tanα)=2010,求1/cos2α+tan2α的值2.已知sin²2α+sin2α*cosα-cos2α=1,α属于(0,π/2),求sinα、tanα的值3.已知sinβ/sinα=cos(α+β),α、β为锐角.求证:tanβ=sin
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![分不多,不一定要全做 1.已知(1+tanα)/(1-tanα)=2010,求1/cos2α+tan2α的值2.已知sin²2α+sin2α*cosα-cos2α=1,α属于(0,π/2),求sinα、tanα的值3.已知sinβ/sinα=cos(α+β),α、β为锐角.求证:tanβ=sin](/uploads/image/z/6926228-44-8.jpg?t=%E5%88%86%E4%B8%8D%E5%A4%9A%2C%E4%B8%8D%E4%B8%80%E5%AE%9A%E8%A6%81%E5%85%A8%E5%81%9A+1.%E5%B7%B2%E7%9F%A5%EF%BC%881%2Btan%CE%B1%EF%BC%89%2F%EF%BC%881-tan%CE%B1%EF%BC%89%3D2010%2C%E6%B1%821%2Fcos2%CE%B1%2Btan2%CE%B1%E7%9A%84%E5%80%BC2.%E5%B7%B2%E7%9F%A5sin%26%23178%3B2%CE%B1%2Bsin2%CE%B1%2Acos%CE%B1-cos2%CE%B1%3D1%2C%CE%B1%E5%B1%9E%E4%BA%8E%EF%BC%880%2C%CF%80%2F2%EF%BC%89%2C%E6%B1%82sin%CE%B1%E3%80%81tan%CE%B1%E7%9A%84%E5%80%BC3.%E5%B7%B2%E7%9F%A5sin%CE%B2%2Fsin%CE%B1%3Dcos%EF%BC%88%CE%B1%2B%CE%B2%EF%BC%89%2C%CE%B1%E3%80%81%CE%B2%E4%B8%BA%E9%94%90%E8%A7%92.%E6%B1%82%E8%AF%81%EF%BC%9Atan%CE%B2%3Dsin)
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