ry much.”“Bai Ziqian might be the one that’s problematic. She’s a demon after all, but she’s with my mother now, so it should be easier. I’m just afraid she doesn’t recognize me,”Liu Qi蓮’s older siste...這表明當 \(t = \frac{1}{2}\) 時，\(f(t)\) 取到極值。考慮到 \(f''(t) = -2 < 0\)，這表明 \(t = \frac{1}{2}\) 處是函數的極大值點。因此，對於任意實數 \(x\)，\[|\sin(x)| \cdot (1 - |\cos(x)|) = |(\sin x)(\cos x)| \leq f\left(\frac{1}{2}\right)...