18+12(sin1−sin14)\frac{1}{8}+\frac{1}{2}\left(\sin 1-\sin \frac{1}{4}\right)81+21(sin1−sin41)
14+12(sin1−sin12)\frac{1}{4}+\frac{1}{2}\left(\sin 1-\sin \frac{1}{2}\right)41+21(sin1−sin21)
38+12(sin1−sin14)\frac{3}{8}+\frac{1}{2}\left(\sin 1-\sin \frac{1}{4}\right)83+21(sin1−sin41)
34+12(sin1−sin12)\frac{3}{4}+\frac{1}{2}\left(\sin 1-\sin \frac{1}{2}\right)43+21(sin1−sin21)