+26400 cosine of .97444
\(\begin{array}{rcll} \cos{(\varphi)} &=& 0.97444 \quad & | \quad \pm\arccos{} \\ \varphi &=& \pm\arccos{(0.97444)} \pm k\cdot 360^{\circ} \quad & | \quad k=0,1,2,\dots \\ \varphi &=& \pm 12.9821752590^{\circ} \pm k\cdot 360^{\circ} \\\\ \mathbf{\varphi_1 }&\mathbf{=}& \mathbf{ 12.9821752590^{\circ} \pm k\cdot 360^{\circ} }\\\\ \varphi_2 &=& -12.9821752590^{\circ} \pm k\cdot 360^{\circ} \\ \varphi_2 &=& 360^{\circ}-12.9821752590^{\circ} \pm k\cdot 360^{\circ} \\ \mathbf{\varphi_2 }&\mathbf{=}& \mathbf{347.017824741\pm k\cdot 360^{\circ}} \end{array}\)
