# §4.24 Inverse Trigonometric Functions: Further Properties

## §4.24(i) Power Series

4.24.1.
4.24.2.
4.24.3, .
4.24.4, .
4.24.5,

which requires to lie between the two rectangular hyperbolas given by

4.24.6

4.24.10.
4.24.11.

## §4.24(iii) Addition Formulas

4.24.13
4.24.14
4.24.15
4.24.16
4.24.17

The above equations are interpreted in the sense that every value of the left-hand side is a value of the right-hand side and vice versa. All square roots have either possible value.