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Exact Value of Trig Functions Calculator
Exact values of sine, cosine and tangent for special angles.
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Exact values of sine, cosine and tangent for special angles.
Exact Value of Trig Functions Estimator
Enter your numbers below for an instant estimate.
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💡 Tip: sin 30 = 1/2, sin 45 = root2/2, sin 60 = root3/2.
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
Exact Quick Guide
Typical values for reference.
| Angle | sin | sin | |
|---|---|---|---|
| 30 | sin 1/2 | sin 1/2 | |
| 45 | sin sqrt(2)/2 | sin sqrt(2)/2 | |
| 120 | sin sqrt(3)/2 | sin sqrt(3)/2 | |
| 225 | sin -sqrt(2)/2 | sin -sqrt(2)/2 | |
| Rule of Thumb | Check inputs | Use as a guide | Round sensibly |
Common Questions
Exact Value of Calculator FAQ
Answers to common questions about this calculator.
Values written with fractions and roots, not decimals.
Multiples of 30 and 45 degrees.
Use the reference angle and the sign rule.
Cosine is zero there.