设向量a=(4cosa,sina),b=(sinβ,4cosβ),c=(cosβ,-4sinβ)(1)若a与b-2c垂直,求tan(a+β)的值(2)求|b+c|的最大值(3)若tanatanβ=16,求证:a//b麻烦你们了,能做几个就帮忙做几个,我希望有你们的答案帮忙指导.
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![设向量a=(4cosa,sina),b=(sinβ,4cosβ),c=(cosβ,-4sinβ)(1)若a与b-2c垂直,求tan(a+β)的值(2)求|b+c|的最大值(3)若tanatanβ=16,求证:a//b麻烦你们了,能做几个就帮忙做几个,我希望有你们的答案帮忙指导.](/uploads/image/z/5411435-59-5.jpg?t=%E8%AE%BE%E5%90%91%E9%87%8Fa%3D%EF%BC%884cosa%2Csina%EF%BC%89%2Cb%3D%28sin%CE%B2%2C4cos%CE%B2%29%2Cc%3D%28cos%CE%B2%2C-4sin%CE%B2%29%281%29%E8%8B%A5a%E4%B8%8Eb-2c%E5%9E%82%E7%9B%B4%2C%E6%B1%82tan%28a%2B%CE%B2%29%E7%9A%84%E5%80%BC%EF%BC%882%EF%BC%89%E6%B1%82%7Cb%2Bc%7C%E7%9A%84%E6%9C%80%E5%A4%A7%E5%80%BC%283%29%E8%8B%A5tanatan%CE%B2%3D16%2C%E6%B1%82%E8%AF%81%EF%BC%9Aa%2F%2Fb%E9%BA%BB%E7%83%A6%E4%BD%A0%E4%BB%AC%E4%BA%86%2C%E8%83%BD%E5%81%9A%E5%87%A0%E4%B8%AA%E5%B0%B1%E5%B8%AE%E5%BF%99%E5%81%9A%E5%87%A0%E4%B8%AA%2C%E6%88%91%E5%B8%8C%E6%9C%9B%E6%9C%89%E4%BD%A0%E4%BB%AC%E7%9A%84%E7%AD%94%E6%A1%88%E5%B8%AE%E5%BF%99%E6%8C%87%E5%AF%BC.)
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