Domain is what goes in,

Range is what comes out


For inverse functions

x goes in, and angle comes out.

Domain and Range of Inverse Trigonometry Functions.jpg

So, domain is all possible values of x

and range is all possible values of angles


Domain and Range of Trigonometry Functions




sin -1

[–1, 1]


cos -1

[–1, 1]


tan -1



cosec -1

R – (–1, 1)

[-π/2,π/2] - {0}

sec -1

R – (–1, 1)


cot -1




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Davneet Singh

Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 14 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.