定义在R上的偶函数f(x)满足f(x+1)= -f(x),且在【-3,-2】上是减函数,α,β是锐角三角形的两个内角,则A,f(sinα)>f(cosβ) B,f(sinα)f(sinβ) D,f(cosα)>f(cosβ)
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![定义在R上的偶函数f(x)满足f(x+1)= -f(x),且在【-3,-2】上是减函数,α,β是锐角三角形的两个内角,则A,f(sinα)>f(cosβ) B,f(sinα)f(sinβ) D,f(cosα)>f(cosβ)](/uploads/image/z/15202921-49-1.jpg?t=%E5%AE%9A%E4%B9%89%E5%9C%A8R%E4%B8%8A%E7%9A%84%E5%81%B6%E5%87%BD%E6%95%B0f%28x%29%E6%BB%A1%E8%B6%B3f%28x%2B1%29%3D+-f%28x%29%2C%E4%B8%94%E5%9C%A8%E3%80%90-3%2C-2%E3%80%91%E4%B8%8A%E6%98%AF%E5%87%8F%E5%87%BD%E6%95%B0%2C%CE%B1%2C%CE%B2%E6%98%AF%E9%94%90%E8%A7%92%E4%B8%89%E8%A7%92%E5%BD%A2%E7%9A%84%E4%B8%A4%E4%B8%AA%E5%86%85%E8%A7%92%2C%E5%88%99A%2Cf%28sin%CE%B1%29%3Ef%28cos%CE%B2%29+B%2Cf%28sin%CE%B1%29f%28sin%CE%B2%29+D%2Cf%28cos%CE%B1%29%3Ef%28cos%CE%B2%29)
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