一道關(guān)于函數(shù)的題，望諸位能不吝賜教，謝謝。圖片地址如下：
熱心網(wǎng)友
函數(shù)f(x)滿足f(cosx)=x/2,x∈[0,π],則f[cos(4π/3)]=？解：f[cos(4π/3)]=f{cos[2π-(2π/3)]=f[cos(2π/3)]=(2π/3)/2=π/3
一道關(guān)于函數(shù)的題，望諸位能不吝賜教，謝謝。圖片地址如下：
函數(shù)f(x)滿足f(cosx)=x/2,x∈[0,π],則f[cos(4π/3)]=？解：f[cos(4π/3)]=f{cos[2π-(2π/3)]=f[cos(2π/3)]=(2π/3)/2=π/3