f(x)=sin²(x+π/4)-sin²(x-π/4)是
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f(x)=sin²(x+π/4)-sin²(x-π/4)是
f(x)=sin²(x+π/4)-sin²(x-π/4)是
f(x)=sin²(x+π/4)-sin²(x-π/4)是
f(x)=sin²(x+π/4)-sin²(x-π/4)是
f(x)=sin²(x+π/4)-sin²(x-π/4)是
f(x)=sin²(x+π/4)-sin²(x-π/4)是