➗ Inverse Cosine Calculator
Find an angle in degrees from its cosine.
Result
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How this calculator works
Find an angle in degrees from its cosine.
Formula
θ=cos⁻¹(x)
Example
cos⁻¹(0.5)=60°.
Frequently asked questions
What does the Inverse Cosine Calculator do?
Find an angle in degrees from its cosine.
Are the results exact?
The calculator follows the displayed formula. Rounded display values may differ slightly from full-precision results.
Can I use negative or decimal values?
Most fields accept decimals and negative values when they make sense for the formula.
How should I check an important result?
Review the formula, verify your entries, and confirm high-stakes work with a qualified teacher or professional.