Our Cos-1 Calculator is an essential online tool for trigonometry. Quickly find the inverse cosine (also known as arccosine or acos) of a given ratio between -1 and 1, instantly calculating the corresponding angle. Perfect for students and professionals solving complex mathematical problems.
Formula:
The formula for the inverse cosine, also known as arccosine, is: Angle = cos-1(x) or Angle = arccos(x).
Where x represents the cosine ratio (the input value between -1 and 1) for which you want to find the corresponding angle.