In this link, we can see the source code of System.Math class. But I cannot find the source code of how sine is defined.
Is there anything I am missing here?
The signature of the method is:
[System.Security.SecuritySafeCritical] // auto-generated
[ResourceExposure(ResourceScope.None)]
[MethodImplAttribute(MethodImplOptions.InternalCall)]
public static extern double Sin(double a);
The extern in the method means it is defined elsewhere. In this case, it will be implemented directly in the CLR (probably written in C or Assembly) which means there is no .NET implementation available.
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