Cosine of Radians Reference Values

Calculate cos(x) from an angle entered in radians.

Author

Dr. Pablo Gutierrez

Math editorial contributor

Chilean climate scientist at the University of Chile, modeling glacier retreat in the Patagonian ice fields

Reviewed for accuracy by

Prof. Hans Muller

Math content reviewer

German renewable energy engineer at TU Munich, pioneering grid-scale hydrogen storage solutions

Last updatedFebruary 22, 2026

PublishedFebruary 22, 2026

Table of Contents

  1. All value pages
  2. Reference table
  3. FAQs
  4. Methodology and review
  5. Related conversions

Reference Value Index

This page lists 25 reference values for quick browsing and lookup.

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All Reference Values

Reference Table

Cosine of Radians reference values
Angle (Radians)cos(x)
-3.141593 rad-1 Cosine Value
-2.879793 rad-0.965926 Cosine Value
-2.617994 rad-0.866025 Cosine Value
-2.356194 rad-0.707106 Cosine Value
-2.094395 rad-0.5 Cosine Value
-1.832596 rad-0.258819 Cosine Value
-1.570796 rad0 Cosine Value
-1.308997 rad0.258819 Cosine Value
-1.047198 rad0.5 Cosine Value
-0.785398 rad0.707107 Cosine Value
-0.523599 rad0.866025 Cosine Value
-0.261799 rad0.965926 Cosine Value
0 rad1 Cosine Value
0.261799 rad0.965926 Cosine Value
0.523599 rad0.866025 Cosine Value
0.785398 rad0.707107 Cosine Value
1.047198 rad0.5 Cosine Value
1.308997 rad0.258819 Cosine Value
1.570796 rad0 Cosine Value
1.832596 rad-0.258819 Cosine Value
2.094395 rad-0.5 Cosine Value
2.356194 rad-0.707106 Cosine Value
2.617994 rad-0.866025 Cosine Value
2.879793 rad-0.965926 Cosine Value
3.141593 rad-1 Cosine Value

Frequently Asked Questions

Frequently asked questions for Cosine of Radians and its reference values.

What does the Cosine of Radians calculator do?

It helps with evaluating cosine values in radian-based math and signal calculations.

What formula does the Cosine of Radians calculator use?

cos(x) returns the cosine of an angle in radians.

What inputs are valid?

Any finite radian angle is valid.

When would I use this?

evaluating cosine values in radian-based math and signal calculations

Methodology and Review

Each row on this page links to a value detail page derived from the same conversion data file as the main calculator and reference table. This reduces inconsistencies across page variants.

Editorial metadata and structured data are rendered across the converter page and linked value pages. Review policies are documented in our review process and editorial policy.