📏 Trigonometry
Sin, cos, tan, inverse functions, and right triangles.
Trigonometry turns angles into ratios: sine, cosine and tangent of any angle in degrees or radians, plus the degree-radian converter for unit mismatches. Every calculator shows the result to full working precision, and switching between the two units takes one click.
- Sine Calculatorsin(θ) in degrees or radians
- Cosine Calculatorcos(θ) in degrees or radians
- Tangent Calculatortan(θ) in degrees or radians
- Degrees ↔ Radians ConverterConvert angles between degrees and radians
Frequently asked questions
What do sine, cosine and tangent actually measure?
Ratios of the sides of a right triangle against its angles: sine pairs opposite over hypotenuse, cosine pairs adjacent over hypotenuse, and tangent pairs opposite over adjacent. Enter any angle above and the calculator returns the ratio directly.
Which trig calculator should I pick?
Read the question as value or unit: the ratio of an angle means sine, cosine or tangent by name, and a unit mismatch uses the degree-radian converter. Right-triangle sides belong to the Pythagorean page rather than these ratio tools.
What is trigonometry used for in real life?
Height from a shadow, roof pitch, navigation bearings, and wave behavior in sound or signals — wherever direction meets distance, trigonometry converts an angle into side information. The three ratio calculators handle the everyday end of that work.