2π⁢∫0π/2sin⁡(2⁢h⁢cos⁡z⁢cos⁡t)⁢ce2⁢n+1⁡(t,h2)⁢ⅆ⁡t=-h⁢A12⁢n+1⁡(h2)ce2⁢n+1′⁡(12⁢π,h2)⁢ce2⁢n+1⁡(z,h2),