The basic inverse trigonometric formulas are as follows:
| Inverse Trig Functions | Formulas |
| Arcsine | sin-1(-x) = -sin-1(x), x ∈ [-1, 1] |
| Arccosine | cos-1(-x) = π -cos-1(x), x ∈ [-1, 1] |
| Arctangent | tan-1(-x) = -tan-1(x), x ∈ R |
| Arccotangent | cot-1(-x) = π – cot-1(x), x ∈ R |
| Arcsecant | sec-1(-x) = π -sec-1(x), |x| ≥ 1 |
| Arccosecant | cosec-1(-x) = -cosec-1(x), |x| ≥ 1 |
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