By Zencalcy Editorial TeamLast reviewed About us
Compute sec(θ) = 1/cos(θ) for any angle in degrees or radians. Where cosine is zero the secant is undefined, and the tool flags it clearly each time.
sec(θ) = 1 / cos(θ) — enter degrees or radians, undefined cases flagged.
sec(θ) = hypotenuse / adjacent = 1 / cos(θ)
Secant is the reciprocal of cosine — large where cosine is small.
| Symbol | Meaning |
|---|---|
| θ | Angle (degrees or radians) |
sec(60°) = 2, sec(0°) = 1, sec(90°) → undefined.
Continue with the Percentage Calculator, all math calculators, or browse the full calculator directory.
Both are supported via the toggle. Most school problems use degrees; calculus and code use radians.
Click to use the Absolute Value Calculator and get instant results.
Click to use the Basic Calculator and get instant results.
Click to use the Scientific Calculator and get instant results.
Click to use the Exponent Calculator and get instant results.
Click to use the Square Root Calculator and get instant results.
Click to use the Cube Root Calculator and get instant results.
Content updated: September 2026