Table 1 The values of $\mathbf{\{}{\mathit{x}}_{\mathit{n}}\mathbf{\}}$ with ${\mathit{x}}_{\mathbf{1}}\mathbf{=}\frac{\mathit{\pi }}{\mathbf{2}}$ , $\mathit{u}\mathbf{=}\frac{\mathit{\pi }}{\mathbf{4}}$ , and ${\mathit{x}}_{\mathbf{1}}\mathbf{=}\frac{\mathit{\pi }}{\mathbf{4}}$ , $\mathit{u}\mathbf{=}\frac{\mathit{\pi }}{\mathbf{6}}$

n

${\mathit{x}}_{\mathbf{1}}\mathbf{=}\frac{\mathit{\pi }}{\mathbf{2}}$, $\mathit{u}\mathbf{=}\frac{\mathit{\pi }}{\mathbf{4}}$

${\mathit{x}}_{\mathbf{1}}\mathbf{=}\frac{\mathit{\pi }}{\mathbf{4}}$, $\mathit{u}\mathbf{=}\frac{\mathit{\pi }}{\mathbf{6}}$

${\mathit{x}}_{\mathit{n}}$

${\mathit{x}}_{\mathit{n}}$