Definition of arc cosine in English:

arc cosine

(also arcos)


  • A mathematical function that is the inverse of the cosine function.

    • ‘The arc cosine is the angle whose cosine is the specified number.’
    • ‘The inverse functions of the sine and the cosine are called the arc sine arcsin and the arc cosine arccos, respectively.’
    • ‘The following example returns the arc cosine of the value in radians.’
    • ‘These functions compute the hyperbolic sine, cosine, tangent, arc sine, arc cosine, and arc tangent functions, which are mathematically defined for an argument x as given in the next figure.’


arc cosine

/ˌɑːk ˈkəʊsʌɪn/