acos()

Returns the inverse cosine, or arc cosine, in radians

Syntax
y = acos(x)

Arguments

Name	Description	Range	Type	Required
x	number	(-∞, ∞)	integer, real, complex	yes

Examples

a = acos(-1)
returns 3.142

Defined in

Built in

See Also

asin(), atan(), atan2()

Notes/Equations

Returned value ranges from 0 to pi.