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Related to arc secant: Arccosecant
arc secant[¦ärk ′sē‚kant]
Also known as antisecant; inverse secant.
For a number x, any angle whose secant equals x.
For a number x, the angle between 0 radians and π radians whose secant equals x ; it is the value at x of the inverse of the restriction of the secant function to the interval between 0 and π.