Sum of Arcsecant and Arccosecant
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Theorem
Let:
- $\mathrm {arcsec} \ x$ be the arcsecant of $x$.
- $\mathrm {arccsc} \ x$ be the arccosecant of $x$.
Then $\mathrm {arcsec}\ x + \mathrm {arccsc} \ x = \dfrac \pi 2$.
Proof
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