## Inverse Cosine

The function , also denoted arccos(), where is the Cosine and the superscript denotes an Inverse Function, not the multiplicative inverse. The Maclaurin Series for the inverse cosine range is

 (1)

The inverse cosine satisfies
 (2)

for Positive and Negative , and
 (3)

for . The inverse cosine is given in terms of other inverse trigonometric functions by
 (4) (5) (6)

for Positive or Negative , and
 (7) (8) (9) (10)

for .

Abramowitz, M. and Stegun, C. A. (Eds.). Inverse Circular Functions.'' §4.4 in Handbook of Mathematical Functions with Formulas, Graphs, and Mathematical Tables, 9th printing. New York: Dover, pp. 79-83, 1972.