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Cos Calculator
Cosine of an angle in degrees or radians.
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cos(angle)
Compare Your Options And Get Clear Answers
Cosine of an angle in degrees or radians.
Cos Estimator
Enter your numbers below for an instant estimate.
0
π‘ Tip: cos(x) = adjacent / hypotenuse.
How It Works
Key concepts behind this calculator
1
Enter Values
Fill in each field with your own numbers.
2
Calculate
Results update as you change the inputs.
3
Review
Read the breakdown and the explanation.
4
Adjust
Change values to compare scenarios.
Quick Reference Guide
Cos Quick Guide
Typical values for reference.
| Angle | Radians | sin | cos |
|---|---|---|---|
| 0 deg | 0.0000 | 0.0000 | 1.0000 |
| 30 deg | 0.5236 | 0.5000 | 0.8660 |
| 45 deg | 0.7854 | 0.7071 | 0.7071 |
| 60 deg | 1.0472 | 0.8660 | 0.5000 |
| Rule of Thumb | Check inputs | Use as a guide | Round sensibly |
Common Questions
Cos Calculator FAQ
Answers to common questions about this calculator.
The ratio of adjacent side to hypotenuse in a right triangle.
Exactly 0.5.
Between -1 and 1.
Multiply by pi / 180.