设f(x)是定义域为R,最小正周期为3π/2的周期函数,当-π/2<=x<0时,f(x)=cosx;
设f(x)是定义域为R,最小正周期为3π/2的周期函数,当-π/2<=x<0时,f(x)=cosx;当0<=x<π时,f(x)=sinx,则f(-15π/4)=?...
设f(x)是定义域为R,最小正周期为3π/2的周期函数,当-π/2<=x<0时,f(x)=cosx;当0<=x<π时,f(x)=sinx,则f(-15π/4)=?
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