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Sum of four inverse trigonometric terms

High school · ●●●○○ 50 pts

Find the value, in degrees, of arcsin⁡110+arccos⁡526+arctan⁡17+arccos⁡865\arcsin \frac{1}{\sqrt{10}}+\arccos \frac{5}{\sqrt{26}}+\arctan \frac{1}{7}+\arccos \frac{8}{\sqrt{65}}.

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argument of a complex numbertrigonometric identities