Question: [cosx] 0 /2 +[sinx] 0 /2 =(cos(/2)+cos(0))+(sin(/2)sin(0)) = ( 0 + 1 ) + ( 1 0 ) = 1 + 1 = 2 =(0+1)+(10)=1+1=2

[cosx] 0 /2 +[sinx] 0 /2 =(cos(/2)+cos(0))+(sin(/2)sin(0)) = ( 0 + 1 ) + ( 1 0 ) = 1 + 1 = 2 =(0+1)+(10)=1+1=2 how do you know these numbers

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