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if f(x)=[[cosx,1,0],[1,2cosx,1],[0,1,2co...

if `f(x)=[[cosx,1,0],[1,2cosx,1],[0,1,2cosx]]`, then `int_0^(pi/2) f(x)`dx = (i)`-1/3` (ii)`1/4` (iii)`1/2` (iv)none of these

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