Trigonometry Calculator
Calculate sine, cosine, and tangent from an angle in degrees or radians. This page also shows cotangent, secant, and cosecant when defined.
Computes:
sin(θ), cos(θ), tan(θ)
| Function | Value |
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Privacy: calculations run locally in your browser. No inputs are stored or transmitted.
How it works
This calculator converts the input angle to radians internally when needed, then evaluates the standard trigonometric functions.
It also reports reciprocal functions when defined:
sec(θ) = 1 / cos(θ),
csc(θ) = 1 / sin(θ),
cot(θ) = cos(θ) / sin(θ)
Examples
- 30° → sin = 0.5, cos ≈ 0.866, tan ≈ 0.577
- π/2 radians ≈ 1.5707963268 → sin = 1, cos ≈ 0
- 45° → sin = cos ≈ 0.7071, tan = 1
FAQ
- What does this trigonometry calculator compute?
It computes sine, cosine, and tangent for a given angle in degrees or radians.
- Can I use degrees or radians?
Yes. You can switch between degree mode and radian mode.
- Why can tangent be undefined?
Tangent is undefined where cosine equals 0, such as 90° + 180°k in degree mode.
- What formulas are used?
This page uses the standard trigonometric functions sin(θ), cos(θ), and tan(θ) = sin(θ) / cos(θ).
- Are calculations stored?
No. Everything runs locally in your browser.