" 19."cot^(-1)(sqrt(1+x^(2))-x)

cot^(-1)sqrt(x)

cot^(-1)sqrt(x)

Write cot^(-1) (sqrt(1+x^(2))-x) in the simplest form.

cot^(-1)((sqrt(1+x^(2))-1)/(x)) =

Evaluate cot^(-1)(sqrt(1+x^(2))+x)

Write into the simplest form: cot^(-1)(sqrt(1+x^(2))+x)

Express sin^(-1)x in terms of (i) cos^(-1)sqrt(1-x^(2)) (ii) "tan"^(-1)x/(sqrt(1-x^(2))) (iii) "cot"^(-1)(sqrt(1-x^(2)))/x