\[\widehat{\alpha}_{n,m}^{(c)}=\frac{1}{2\pi}\int_{0}^{2\pi}\cos t\operatorname{%
ce}_{n}\left(t,h^{2}\right)\operatorname{ce}_{m}\left(t,h^{2}\right)\,\mathrm{%
d}t=(-1)^{p+1}\dfrac{2}{\mathrm{i}\pi}\dfrac{\operatorname{ce}_{n}\left(0,h^{2%
}\right)\operatorname{ce}_{m}\left(0,h^{2}\right)}{h\operatorname{Dc}_{0}\left%
(n,m,0\right)}.\]