1. arccos

noun. the inverse function of the cosine; the angle that has a cosine equal to a given number.


  • circular function
  • arccosine
  • inverse cosine
  • trigonometric function


  • arc- (English)
  • cos (English)

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Example sentences of the word arccos

1. Noun, singular or mass
Finding the arccos of the value will result in the measurement of the angle.

2. Adverb
In the above example, arccos 1/2 = 60 degress or pi / 3 radians, so the equation becomes 2x = 60.