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If f(x)=[[1+sin^2x,cos^2x,4sin2x],[sin^2...

If `f(x)=[[1+sin^2x,cos^2x,4sin2x],[sin^2x,1+cos^2x,4sin2x],[sin^2x,cos^2x,1+4sin2x]]`
what is the maximum value of f(x).

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