Arccosine to Radians Reference Values
Calculate inverse cosine and return the principal angle in radians.
Table of Contents
Reference Value Index
This page lists 15 reference values for quick browsing and lookup.
All Reference Values
- -1 Cosine Value = 3.141593 rad
- -0.95 Cosine Value = 2.824032 rad
- -0.9 Cosine Value = 2.690566 rad
- -0.8 Cosine Value = 2.498092 rad
- -0.75 Cosine Value = 2.418858 rad
- -0.5 Cosine Value = 2.094395 rad
- -0.25 Cosine Value = 1.823477 rad
- 0 Cosine Value = 1.570796 rad
- 0.25 Cosine Value = 1.318116 rad
- 0.5 Cosine Value = 1.047198 rad
- 0.75 Cosine Value = 0.722734 rad
- 0.8 Cosine Value = 0.643501 rad
- 0.9 Cosine Value = 0.451027 rad
- 0.95 Cosine Value = 0.31756 rad
- 1 Cosine Value = 0 rad
Reference Table
| Cosine Value | acos(x) |
|---|---|
| -1 Cosine Value | 3.141593 rad |
| -0.95 Cosine Value | 2.824032 rad |
| -0.9 Cosine Value | 2.690566 rad |
| -0.8 Cosine Value | 2.498092 rad |
| -0.75 Cosine Value | 2.418858 rad |
| -0.5 Cosine Value | 2.094395 rad |
| -0.25 Cosine Value | 1.823477 rad |
| 0 Cosine Value | 1.570796 rad |
| 0.25 Cosine Value | 1.318116 rad |
| 0.5 Cosine Value | 1.047198 rad |
| 0.75 Cosine Value | 0.722734 rad |
| 0.8 Cosine Value | 0.643501 rad |
| 0.9 Cosine Value | 0.451027 rad |
| 0.95 Cosine Value | 0.31756 rad |
| 1 Cosine Value | 0 rad |
Frequently Asked Questions
Frequently asked questions for Arccosine to Radians and its reference values.
What does the Arccosine to Radians calculator do?
It helps with recovering angles from known cosine values in trig and vector calculations.
What formula does the Arccosine to Radians calculator use?
acos(x) returns the principal inverse cosine angle in radians, in the range [0, π].
What inputs are valid?
Input must be between -1 and 1 inclusive for real-number results.
When would I use this?
recovering angles from known cosine values in trig and vector calculations
Methodology and Review
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