List of Trigonometric Functions
| Function (abbreviation) | Definition | Formula |
| sine (sin) | opposite / hypotenuse | sin A = a/c |
| cosine (cos) | adjacent / hypotenuse | cos A = b/c |
| tangent (tan) | opposite / adjacent | tan A = a/b |
| cotangent (cot or ctn) | adjacent / opposite | cot A = b/a |
| secant (sec) | hypotenuse / adjacent | sec A = c/b |
| cosecant (csc) | hypotenuse / opposite | csc A = c/a |