Arccosine to Degrees

Calculate the inverse cosine and return the principal angle in degrees.

Author

Prof. Anna Kowalska

Math editorial contributor

Polish biostatistician at the University of Warsaw, advancing Bayesian methods for clinical trial design

Reviewed by

Dr. Isabella Rossi

Math content reviewer

Italian neuroscientist at Sapienza University of Rome, studying the neural mechanisms of bilingual language processing

Last updatedFebruary 22, 2026

PublishedFebruary 22, 2026

Table of Contents

  1. Reference values
  2. Calculator
  3. Reference table
  4. FAQs
  5. Methodology and review
  6. Related conversions

0 Cosine Value =

90 deg

Representative value from the Arccosine to Degrees reference table.

Reference Values

Browse 15 reference values with individual detail pages for quick lookup.

Browse all reference values

Arccosine to Degrees

Calculate the inverse cosine and return the principal angle in degrees.

Calculated Result

Reference Table

Use this complete table for quick lookup and internal linking to specific value pages.

Arccosine to Degrees Reference
Cosine Valueacos(x) in Degrees
-1 Cosine Value180 deg
-0.95 Cosine Value161.805128 deg
-0.9 Cosine Value154.158067 deg
-0.8 Cosine Value143.130102 deg
-0.75 Cosine Value138.590378 deg
-0.5 Cosine Value120 deg
-0.25 Cosine Value104.477512 deg
0 Cosine Value90 deg
0.25 Cosine Value75.522488 deg
0.5 Cosine Value60 deg
0.75 Cosine Value41.409622 deg
0.8 Cosine Value36.869898 deg
0.9 Cosine Value25.841933 deg
0.95 Cosine Value18.194872 deg
1 Cosine Value0 deg

Frequently Asked Questions

Common questions about Arccosine to Degrees, formulas, and typical use cases.

What does the Arccosine to Degrees calculator do?

It helps with finding angles from known cosine values in geometry and vector math.

What formula does the Arccosine to Degrees calculator use?

Angle (degrees) = acos(x) × 180 / π, principal range 0° to 180°.

What inputs are valid?

Input must be between -1 and 1 inclusive for real-number results.

When would I use this?

finding angles from known cosine values in geometry and vector math

Methodology and Review

This page combines a live calculator, precomputed reference values, and FAQ content from the same conversion definition to reduce mismatch between calculator output and lookup tables.

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