Cofunction Calculator
Cofunction identities: sin(x) = cos(90 – x), tan(x) = cot(90 – x), and so on, with values.
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Cofunction identities: sin(x) = cos(90 – x), tan(x) = cot(90 – x), and so on, with values.
Cofunction Estimator
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How It Works
Key concepts behind this calculator
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Cofunction Quick Guide
Typical values for reference.
| x | sin x | cos(90 – x) | Complement |
|---|---|---|---|
| 0 | 0 | 0 | 90 |
| 30 | 0.5 | 0.5 | 60 |
| 45 | 0.7071 | 0.7071 | 45 |
| 60 | 0.866 | 0.866 | 30 |
| Rule of Thumb | Check inputs | Use as a guide | Round sensibly |
Cofunction Calculator FAQ
Answers to common questions about this calculator.
The partner function of a complementary angle, like sine and cosine.
The acute angles of a right triangle are complementary.
sin x = cos(90 – x); tan x = cot(90 – x); sec x = csc(90 – x).
It is an estimate based on the inputs you enter. Check real quotes, labels or official guidance for important decisions.