Arc-ed up

Geometry Level 2

\[\arcsin 1 + \arccos 1 + \arctan 1 + \text{arccot} \, 1 + \text{arcsec} \, 1 + \text{arccsc} \,1 = \]

\[\dfrac{\pi}{4}\] \[\dfrac{3\pi}{4}\] \[0\] \[\pi\] \[\dfrac{7\pi}{4}\] \[\dfrac{\pi}{2}\] \[\dfrac{3\pi}{2}\] \[\dfrac{5\pi}{4}\]

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