Expression 1: sine left parenthesis, 2 "x" , right parenthesis minus left parenthesis, "x" minus StartFraction, pi Over 4 , EndFraction , right parenthesis cosine left parenthesis, 2 "x" , right parenthesis minus StartFraction, pi Over 4 , EndFractionsin2x−x−π4cos2x−π4
1
面積が最大 left parenthesis, StartFraction, pi Over 4 , EndFraction , 1 minus StartFraction, pi Over 4 , EndFraction , right parenthesisπ4,1−π4