1.求证:[sin^2a+tan(a/2)tana+cos^2]*(sin^2a/2cosa)=tana [sin^2a 是sina指的平方,可能看不太清]2.已知:tan(a/2)=2,求(6sina+cosa)/(3sina-2cosa)的值3.已知:sin^2a+sin2acosa-cos2a=1,a属于(0,π/2),求sina,tana
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![1.求证:[sin^2a+tan(a/2)tana+cos^2]*(sin^2a/2cosa)=tana [sin^2a 是sina指的平方,可能看不太清]2.已知:tan(a/2)=2,求(6sina+cosa)/(3sina-2cosa)的值3.已知:sin^2a+sin2acosa-cos2a=1,a属于(0,π/2),求sina,tana](/uploads/image/z/5198843-11-3.jpg?t=1.%E6%B1%82%E8%AF%81%EF%BC%9A%5Bsin%5E2a%2Btan%28a%2F2%29tana%2Bcos%5E2%5D%2A%28sin%5E2a%2F2cosa%29%3Dtana+%5Bsin%5E2a+%E6%98%AFsina%E6%8C%87%E7%9A%84%E5%B9%B3%E6%96%B9%2C%E5%8F%AF%E8%83%BD%E7%9C%8B%E4%B8%8D%E5%A4%AA%E6%B8%85%5D2.%E5%B7%B2%E7%9F%A5%EF%BC%9Atan%28a%2F2%29%3D2%2C%E6%B1%82%286sina%2Bcosa%29%2F%283sina-2cosa%29%E7%9A%84%E5%80%BC3.%E5%B7%B2%E7%9F%A5%EF%BC%9Asin%5E2a%2Bsin2acosa-cos2a%3D1%2Ca%E5%B1%9E%E4%BA%8E%280%2C%CF%80%2F2%29%2C%E6%B1%82sina%2Ctana)
1.求证:[sin^2a+tan(a/2)tana+cos^2]*(sin^2a/2cosa)=tana [sin^2a 是sina指的平方,可能看不太清]2.已知:tan(a/2)=2,求(6sina+cosa)/(3sina-2cosa)的值3.已知:sin^2a+sin2acosa-cos2a=1,a属于(0,π/2),求sina,tana
1.求证:[sin^2a+tan(a/2)tana+cos^2]*(sin^2a/2cosa)=tana [sin^2a 是sina指的平方,可能看不太清]
2.已知:tan(a/2)=2,求(6sina+cosa)/(3sina-2cosa)的值
3.已知:sin^2a+sin2acosa-cos2a=1,a属于(0,π/2),求sina,tana
1.求证:[sin^2a+tan(a/2)tana+cos^2]*(sin^2a/2cosa)=tana [sin^2a 是sina指的平方,可能看不太清]2.已知:tan(a/2)=2,求(6sina+cosa)/(3sina-2cosa)的值3.已知:sin^2a+sin2acosa-cos2a=1,a属于(0,π/2),求sina,tana
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