Formula Database | Formula Sheet
This is our growing database of formulas. Here you can find formulas and copy them directly to LaTeX or Microsoft Word 2007+. The formulas with a ⌨ icon feature calculators that allow you to solve for an unknown variable. For additional features including cloud formula storage and searching this database, check out If you would like to help us build this free resource, please contact us.



Trigonometric identities

Cosine double-angle formula
Cosine sum and difference identity
Cosine triple-angle formula
Cotangent double-angle formula
Cotangent triple-angle formula
Pythagorean identity
Pythagorean identity (cotangent and cosecant)
Pythagorean identity (tangent and secant)
Sine double-angle formula
Sine sum and difference identity
Sine triple-angle formula
Tangent double-angle formula
Tangent sum and difference identity
Tangent triple-angle formula
Trigonometric functions shifts and periodicity
Trigonometric functions symmetry