大家看看这道三角函数题哪里做错了?已知函数f(x)=1-2a-2acosx-2sin^2x的最小值是g(a)(1)求g(a)(2)若g(a)=0.5 则求此时的a和f(x)的最大值(1)原式=1-2a-2acosx-2(1-cos^2x) 令t=cosx 则原式=1-2a
来源:学生作业帮助网 编辑:作业帮 时间:2024/08/05 06:38:00
![大家看看这道三角函数题哪里做错了?已知函数f(x)=1-2a-2acosx-2sin^2x的最小值是g(a)(1)求g(a)(2)若g(a)=0.5 则求此时的a和f(x)的最大值(1)原式=1-2a-2acosx-2(1-cos^2x) 令t=cosx 则原式=1-2a](/uploads/image/z/9082296-0-6.jpg?t=%E5%A4%A7%E5%AE%B6%E7%9C%8B%E7%9C%8B%E8%BF%99%E9%81%93%E4%B8%89%E8%A7%92%E5%87%BD%E6%95%B0%E9%A2%98%E5%93%AA%E9%87%8C%E5%81%9A%E9%94%99%E4%BA%86%3F%E5%B7%B2%E7%9F%A5%E5%87%BD%E6%95%B0f%28x%29%3D1-2a-2acosx-2sin%5E2x%E7%9A%84%E6%9C%80%E5%B0%8F%E5%80%BC%E6%98%AFg%EF%BC%88a%EF%BC%89%EF%BC%881%EF%BC%89%E6%B1%82g%EF%BC%88a%EF%BC%89%EF%BC%882%EF%BC%89%E8%8B%A5g%EF%BC%88a%EF%BC%89%3D0.5+%E5%88%99%E6%B1%82%E6%AD%A4%E6%97%B6%E7%9A%84a%E5%92%8Cf%EF%BC%88x%EF%BC%89%E7%9A%84%E6%9C%80%E5%A4%A7%E5%80%BC%EF%BC%881%EF%BC%89%E5%8E%9F%E5%BC%8F%3D1-2a-2acosx-2%281-cos%5E2x%29+%E4%BB%A4t%3Dcosx+%E5%88%99%E5%8E%9F%E5%BC%8F%3D1-2a)
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