向量a=(cosa,sina),向量b=(cosb,sinb)且a与b满足|a-kb|=根号3|ka+b|(k>0)(1)试用k表示a·b(2)求a·b最大值,并求出此时a与b夹角的大小我的解法在图中,点击看大图,请问错在哪里?正确的方法是怎样的?
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![向量a=(cosa,sina),向量b=(cosb,sinb)且a与b满足|a-kb|=根号3|ka+b|(k>0)(1)试用k表示a·b(2)求a·b最大值,并求出此时a与b夹角的大小我的解法在图中,点击看大图,请问错在哪里?正确的方法是怎样的?](/uploads/image/z/2623183-7-3.jpg?t=%E5%90%91%E9%87%8Fa%3D%28cosa%2Csina%29%2C%E5%90%91%E9%87%8Fb%3D%28cosb%2Csinb%29%E4%B8%94a%E4%B8%8Eb%E6%BB%A1%E8%B6%B3%7Ca-kb%7C%3D%E6%A0%B9%E5%8F%B73%7Cka%2Bb%7C%28k%3E0%29%281%29%E8%AF%95%E7%94%A8k%E8%A1%A8%E7%A4%BAa%C2%B7b%282%29%E6%B1%82a%C2%B7b%E6%9C%80%E5%A4%A7%E5%80%BC%2C%E5%B9%B6%E6%B1%82%E5%87%BA%E6%AD%A4%E6%97%B6a%E4%B8%8Eb%E5%A4%B9%E8%A7%92%E7%9A%84%E5%A4%A7%E5%B0%8F%E6%88%91%E7%9A%84%E8%A7%A3%E6%B3%95%E5%9C%A8%E5%9B%BE%E4%B8%AD%2C%E7%82%B9%E5%87%BB%E7%9C%8B%E5%A4%A7%E5%9B%BE%2C%E8%AF%B7%E9%97%AE%E9%94%99%E5%9C%A8%E5%93%AA%E9%87%8C%3F%E6%AD%A3%E7%A1%AE%E7%9A%84%E6%96%B9%E6%B3%95%E6%98%AF%E6%80%8E%E6%A0%B7%E7%9A%84%3F)
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