Trigonometric Identity Verifier
Choose supported expressions, enter sample angles, and compare their numerical values without executing arbitrary code.
A QUICK WALKTHROUGH
How to use this tool
- Choose one supported expression for each side.
- Enter sample angles in degrees, separated by commas.
- Review the numerical differences and remember that samples do not prove a symbolic identity.
Restricted numerical check
Only the listed built-in expressions are available. User text is treated as data, so no arbitrary JavaScript or code execution is used.
Not a proof
Matching finite samples can support a hypothesis but cannot prove a symbolic trigonometric identity. Use a symbolic method for proof.
GOOD TO KNOW
Common questions
Does a match prove the identity?
No. It is only a numerical spot-check at the angles you provide.
Can I enter arbitrary JavaScript?
No. Expressions come from a fixed safe selection list.
Which angle unit is used?
Enter degrees; the tool converts them locally for the trigonometric functions.