Trigonometric Values Calculator (sin, cos, tan)
Trigonometric values and angle conversion sin, cos, tan, cot
Choose degrees or radians and enter a number or an expression with pi. The tool converts the unit, finds the signs on the unit circle and looks up the special-angle table.
The calculator above returns the sine, cosine, tangent, and cotangent of an angle and converts between degrees and radians, with exact values for special angles.
Formulas used
α(rad) = α(°) · π / 180
tan α = sin α / cos α, cot α = cos α / sin α
- tan α is undefined when cos α = 0, for example α = 90°.
- cot α is undefined when sin α = 0, for example α = 0° or 180°.
Worked example
For α = 60°:
sin 60° = √3/2, cos 60° = 1/2, tan 60° = √3
Enter the same values in the calculator above to see every step of the solution.
How to use the calculator
- Enter the angle and choose degrees or radians.
- Press the calculate button. The result appears instantly.
- Read the step-by-step solution, rendered with KaTeX, to check your own work.