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INVERSE TRIGONOMETRIC FUNCTIONS - NCERT
INVERSE TRIGONOMETRIC FUNCTIONS 2.1 Overview 2.1.1 Inverse function Inverse of a function ‘f ’ exists, if the function is one-one and onto, i.e, bijective. Since trigonometric functions are many-one over their domains, we restrict their domains and co-domains in order to make them one-one and onto and then find their inverse.
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