From professional translators, enterprises, web pages and freely available translation repositories.
mae' r ffwythiant acos () yn dychwelyd yr arc cosin mewn radianau, a diffinir y gwerth yn fathemategol i fod rhwng 0 a pi (cynhwysol).
the acos() function returns the arc cosine in radians and the value is mathematically defined to be 0 to pi (inclusive).