| Trig. ratio | Abbr. | Reciprocal | Definition |
|---|---|---|---|
| cosecant θ | csc θ |  |
 |
| secant θ | sec θ |  |
 |
| cotangent θ | cot θ |  |
 |
 |
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| Trig. ratio | Abbr. | Reciprocal | Definition |
|---|---|---|---|
| cosecant θ | csc θ | |
|
| secant θ | sec θ | |
|
| cotangent θ | cot θ | |
|
|
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