Returns the angle whose cosine is the specified number.
static member Acos :
d: float -> float
Parameters d Type: System .Double
A number representing a cosine, where
d must be greater than or equal to -1, but less than or equal to 1. Return Value
System .Double An angle, θ, measured in radians, such that 0 ≤ θ ≤ π -or- if NaN d < -1 or d > 1 or d equals . NaN
Multiply the return value by 180/
to convert from radians to degrees. Math .PI
The following example uses the
method to assist in the computation of the inner angles of a given trapezoid. Acos
No code example is currently available or this language may not be supported.
Supported in: 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0
.NET Framework Client Profile
Supported in: 4, 3.5 SP1
Portable Class Library
Supported in: Portable Class Library
.NET for Windows Store apps
Supported in: Windows 8
Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.