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Compute csc(θ) = 1/sin(θ) for any angle in degrees or radians. Multiples of 180° (sine zero) are undefined and flagged clearly each time.
csc(θ) = 1 / sin(θ) — enter degrees or radians, undefined cases flagged.
csc(θ) = hypotenuse / opposite = 1 / sin(θ)
Cosecant is the reciprocal of sine.
| Symbol | Meaning |
|---|---|
| θ | Angle (degrees or radians) |
csc(30°) = 2, csc(90°) = 1, csc(0°) → undefined.
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Content updated: September 2026