Trigonometry Tools
Sine, cosine, tangent calculators, angle converters, and triangle solvers.
Special Right Triangle Calculator
Solve 30°-60°-90° and 45°-45°-90° special right triangles with exact radical values (1:1:√2 and 1:√3:2), area, perimeter, and live SVG geometry.
Unit Circle Calculator
Explore exact Cartesian coordinates (x, y) = (cos θ, sin θ), degree-to-radian conversions, ASTC quadrant rules, and all 6 trigonometric functions on the unit circle.
Right Triangle Calculator
Solve for missing sides, acute angles, hypotenuse, area, perimeter, and altitude using SOH-CAH-TOA and the Pythagorean theorem with live SVG geometry.
Sine Calculator
Compute the sine value of an angle in degrees, radians, or gradients.
Cosine Calculator
Calculate the cosine of an angle in degrees or radians.
Tangent Calculator
Calculate the tangent of an angle easily.
Trigonometric Functions Calculator
Solve all six primary and reciprocal trig functions (sin, cos, tan, csc, sec, cot) simultaneously.
Angle Converter
Convert angles between Degrees, Radians, Gradians, and Turns.
Arcsine Calculator: Inverse Sine Tool
Calculate arcsine (sin⁻¹) in degrees, radians, and exact π multiples with interactive unit circle visualization and triangle ratios.
Reference Angle Calculator
Calculate acute reference angles (θ') in degrees and radians, identify quadrant location, coterminal angles, ASTC signs, and exact trigonometric ratios with an interactive unit circle visualizer.
Arctan Calculator
Calculate inverse tangent (arctan / tan⁻¹) of any real number in exact π radians, decimal degrees, slope percentage, and 4-quadrant atan2(y, x).
Cosecant Calculator
Free online Cosecant Calculator with step-by-step mathematical solutions, formulas, worked examples, and interactive calculator.
Cosine Function Evaluator
Free online Cosine Function Evaluator with step-by-step mathematical solutions, formulas, worked examples, and interactive calculator.
Angle Converter: Degrees to Radians
Free online Angle Converter: Degrees to Radians with step-by-step mathematical solutions, formulas, worked examples, and interactive calculator.
Arccos Calculator: Inverse Cosine in Radians & Degrees
Free online Arccos Calculator: Inverse Cosine in Radians & Degrees with step-by-step mathematical solutions, formulas, worked examples, and interactive calculator.
Cosecant Calculator | Online csc Calculator
Free online Cosecant Calculator | Online csc Calculator with step-by-step mathematical solutions, formulas, worked examples, and interactive calculator.
Hyperbolic Tangent (tanh) Calculator
Online mathematical calculator to compute Hyperbolic Tangent (tanh) accurately with formulas and step-by-step verification.
Cotangent Calculator: Online Cot(x) Tool
Free online Cotangent Calculator: Online Cot(x) Tool with step-by-step mathematical solutions, formulas, worked examples, and interactive calculator.
Degrees to Radians Converter
Online mathematical calculator to compute Degrees to Radians accurately with formulas and step-by-step verification.
Cosine Calculator: Find Cosine of Angle in Degrees/Radians
Free online Cosine Calculator: Find Cosine of Angle in Degrees/Radians with step-by-step mathematical solutions, formulas, worked examples, and interactive calculator.
Half Angle Calculator: sin(θ/2), cos(θ/2), tan(θ/2)
Online mathematical calculator to compute Half Angle: sin(θ/2), cos(θ/2), tan(θ/2) accurately with formulas and step-by-step verification.
Radians to Degrees Converter
Online mathematical calculator to compute Radians to Degrees accurately with formulas and step-by-step verification.
Radians to Degrees Converter
Online mathematical calculator to compute Radians to Degrees accurately with formulas and step-by-step verification.
Double Angle Identity Calculator
Online mathematical calculator to compute Double Angle Identity accurately with formulas and step-by-step verification.
Hyperbolic Sine Calculator
Online mathematical calculator to compute Hyperbolic Sine accurately with formulas and step-by-step verification.
Interactive Cotangent Calculator | Visualize & Calculate cot(θ)
Free online Interactive Cotangent Calculator | Visualize & Calculate cot(θ) with step-by-step mathematical solutions, formulas, worked examples, and interactive calculator.
Pythagorean Identity Verifier
Online mathematical calculator to compute Pythagorean Identity Verifier accurately with formulas and step-by-step verification.
Arccot Calculator - Find Arccotangent in Radians & Degrees
Free online Arccot Calculator - Find Arccotangent in Radians & Degrees with step-by-step mathematical solutions, formulas, worked examples, and interactive calculator.
Sum-to-Product Calculator: Simplify Trigonometric Sums
Online mathematical calculator to compute Sum-to-Product: Simplify Trigonometric Sums accurately with formulas and step-by-step verification.
Secant Calculator: Calculate Secant of Angle in Degrees & Radians
Free online Secant Calculator: Calculate Secant of Angle in Degrees & Radians with step-by-step mathematical solutions, formulas, worked examples, and interactive calculator.
Sine Calculator - Calculate Sine of Angle
Free online Sine Calculator - Calculate Sine of Angle with step-by-step mathematical solutions, formulas, worked examples, and interactive calculator.
Right Triangle Side Calculator
Online mathematical calculator to compute Right Triangle Side accurately with formulas and step-by-step verification.
Secant Calculator: Find Secant of Angle
Free online Secant Calculator: Find Secant of Angle with step-by-step mathematical solutions, formulas, worked examples, and interactive calculator.
Sine Function Calculator: sin(x) in Radians
Free online Sine Function Calculator: sin(x) in Radians with step-by-step mathematical solutions, formulas, worked examples, and interactive calculator.
Tangent Calculator: Find Tangent of Angle in Degrees/Radians
Free online Tangent Calculator: Find Tangent of Angle in Degrees/Radians with step-by-step mathematical solutions, formulas, worked examples, and interactive calculator.
Tangent Calculator: Tan(x) in Radians
Free online Tangent Calculator: Tan(x) in Radians with step-by-step mathematical solutions, formulas, worked examples, and interactive calculator.
Radians to Degrees Converter
Online mathematical calculator to compute Radians to Degrees accurately with formulas and step-by-step verification.
Interactive Coterminal Angle Calculator - Degrees & Radians
Free online Interactive Coterminal Angle Calculator - Degrees & Radians with step-by-step mathematical solutions, formulas, worked examples, and interactive calculator.
Trigonometry Calculators and Tools
Trigonometry is the branch of mathematics that studies the relationships between the sides and angles of triangles. Originally developed by ancient Greek and Indian astronomers to predict celestial movements, trigonometric functions are now indispensable in physics, engineering, computer graphics, music theory, and navigation.
Solve Triangles and Angle Problems Instantly
Our trigonometry calculators handle the six standard trigonometric functions (sine, cosine, tangent, cosecant, secant, and cotangent) along with their inverse functions. Whether you need to find a missing side of a right triangle, convert between degrees and radians, or apply the Law of Sines and Cosines to oblique triangles, our tools provide accurate results with full step-by-step solutions.
Key Features of Our Trigonometry Tools
- Right Triangle Solver: Enter any two known values (sides or angles) and compute the remaining dimensions using SOH-CAH-TOA relationships.
- Angle Conversion: Seamlessly convert between degrees, radians, and gradians with precision up to 15 decimal places.
- Trigonometric Function Calculator: Evaluate sin, cos, tan, and their inverses for any angle value in degrees or radians.
- Law of Sines & Cosines: Solve oblique triangles where standard right-triangle rules do not apply.
Trigonometry is used daily by surveyors measuring land, pilots calculating flight paths, game developers rendering 3D environments, and audio engineers analyzing sound waves. Our calculators bring these powerful mathematical tools to your fingertips for free.