Sine, cosine, tangent, distance, angle, and vector calculators. Browse our free trigonometry tools below — all calculators are instant, accurate, and require no sign-up.
2D Distance Calculator — Calculate the distance between two points in 2D space using Euclidean, Manhattan, or Chebyshev metrics. Also computes midpoint, slope, and component breakdown.
3D Distance Calculator — Calculate the Euclidean distance between two points in 3D space, plus midpoint, direction cosines, direction angles, and 2D projection comparisons.
Arccos Calculator (Inverse Cosine) — Calculate the inverse cosine (arccos) of any value from −1 to 1. Returns the angle in degrees and radians, plus related trig values, quadrant, and unit circle position.
Arcsin Calculator (Inverse Sine) — Calculate the inverse sine (arcsin) of any value from −1 to 1. Returns the angle in degrees and radians, plus cosine, tangent, quadrant, reference angle, and unit circle position.
Arcus Tangent (atan2) Calculator — Full Quadrant Arctangent — Calculate atan2(y, x) with full quadrant awareness. Enter y and x coordinates to find the angle in degrees and radians, quadrant, reference angle, magnitude, and normalized direction vector.
Arctan Calculator (Inverse Tangent) — Calculate the inverse tangent (arctan) of any value. Supports both atan(x) and atan2(y,x) modes for full 360° angle resolution. Returns degrees, radians, quadrant, and related trig values.
Complementary & Supplementary Angles Calculator — Find the complement (90° − θ) and supplement (180° − θ) of any angle. See cofunction identities, trig values of both angles, and the explement. Includes angle pair tables and visual bars.
Conic Sections Calculator — Circle, Ellipse, Parabola, Hyperbola — Identify and analyze conic sections from the general equation Ax² + Bxy + Cy² + Dx + Ey + F = 0. Find the type, center, foci, vertices, eccentricity, and standard form for circles, ellipses, parabo...
Complex Number to Trigonometric Form Calculator (a + bi → Polar) — Convert a complex number from rectangular form a + bi to trigonometric (polar) form r(cos θ + i sin θ). Shows modulus, argument, exponential form, quadrant, reciprocal, and De Moivre powers.
Consecutive Integers Calculator — Find consecutive integers that sum to a target value, generate integer sequences, and explore even and odd consecutive integers with formulas and visualizations.
Coordinate Distance Calculator — Calculate the distance between two points in a coordinate plane using Euclidean, Manhattan, Chebyshev, and Minkowski metrics with midpoint, slope, and angle analysis.
Inverse Cosine (arccos) Calculator — Calculate the inverse cosine (arccos) of any value from −1 to 1. Get the principal value in degrees and radians, general solutions, related trig values, and a reference table.
Cosine (cos) Calculator — Calculate the cosine of any angle in degrees or radians. View all six trig functions, quadrant, reference angle, and a complete common cosine values table.
Cos Inverse Calculator (arccos / cos⁻¹) — Calculate the inverse cosine (cos⁻¹) of any value from −1 to 1. Returns the angle in degrees, radians, and gradians with unit circle visual.
Cos(2θ) Double Angle Calculator — Calculate cos(2θ) using all three double-angle formulas: 1−2sin²θ, 2cos²θ−1, and cos²θ−sin²θ. Verify equality, explore special angles, and visualize form comparisons.
Cosine Similarity Calculator — Vectors & Angles — Calculate cosine similarity between two vectors in 2D–5D. Shows dot product, magnitudes, angle, similarity gauge, and component breakdown table.
Cosh Calculator (Hyperbolic Cosine) — Calculate the hyperbolic cosine cosh(x) and all six hyperbolic functions. Includes identity verification, comparison table, and custom range generator.
Cotangent Calculator (cot θ) — Calculate the cotangent of any angle in degrees or radians. Shows all 6 trig functions, quadrant visual, common values table, and identity reference.
Coterminal Angle Calculator — Find coterminal angles by adding or subtracting 360° (2π). Shows reference angle, quadrant, trig values, and generates a table of N coterminal angles.
Cosecant Calculator (csc θ) — Calculate the cosecant of any angle in degrees, radians, or gradians. Shows all 6 trig functions, quadrant sign chart, common values table, and reference identities.
Distance Between Two Points Calculator — Calculate the distance between two points in 2D or 3D space. Shows midpoint, slope, line equation, displacement vector, and step-by-step solution with coordinate visualization.
Distance from Point to Plane Calculator — Calculate the perpendicular distance from a point to a plane in 3D space. Shows signed distance, normal vector, foot of perpendicular, formula breakdown, and verification.
Double Angle Calculator — sin(2θ), cos(2θ), tan(2θ) — Calculate double angle formulas for sin(2θ), cos(2θ), and tan(2θ). Shows all three cos(2θ) forms, verification table, original vs double angle comparison, and identity reference.
Double Angle Formula Calculator — Explore sin(2θ), cos(2θ) in three forms, and tan(2θ) with step-by-step proofs, power-reducing derivations, and a comparison table.
Double-Angle Identity Verifier Calculator — Verify all double-angle identities for any angle. Compare LHS vs RHS, check error margins, and explore power-reducing and half-angle connections.
Euclidean Distance Calculator (N-Dimensional) — Calculate Euclidean distance in 2D to 10D with step-by-step breakdown, component analysis, and comparison with Manhattan and Chebyshev distances.
Half-Angle Formula Calculator — Calculate sin(θ/2), cos(θ/2), and tan(θ/2) with automatic sign by quadrant, three tan forms, and double-angle back-verification.
Intersection of Two Lines Calculator — Find Where Lines Cross — Find the intersection point of two lines in slope-intercept, point-slope, or general form. Shows angle between lines, parallel/perpendicular detection, and coordinate visualization.
Inverse Cosine (arccos) Calculator — Degrees, Radians & More — Calculate the inverse cosine (arccos) of any value. Get results in degrees, radians, gradians, and turns with domain checking, related trig values, and a common values reference table.
Inverse Trigonometric Functions Calculator — All 6 at Once — Calculate all six inverse trig functions simultaneously: arcsin, arccos, arctan, arccsc, arcsec, arccot. Enter a value and see every result with domain checking, identities, and visual comparison.
Inverse Tangent (arctan) Calculator — arctan & atan2 Modes — Calculate arctan(x) or atan2(y,x) with full quadrant support. Get results in degrees, radians, gradians, and turns with quadrant identification, common values table, and atan-vs-atan2 comparison.
Law of Cosines Calculator — Solve Any Triangle — Solve any triangle using the law of cosines. Find unknown sides or angles, compute area, perimeter, circumradius, inradius, and classify the triangle type.
Line of Intersection of Two Planes Calculator — Find the line where two planes intersect in 3D space. Computes direction vector, parametric equations, a point on the line, and the angle between the planes.
Manhattan Distance Calculator — Taxicab & L1 Distance — Calculate Manhattan (taxicab/L1) distance in 2D, 3D, or N dimensions. Compare with Euclidean and Chebyshev distances with component breakdown and grid visualization.
Polar to Rectangular Coordinates Converter — Convert between polar (r, θ) and rectangular (x, y) coordinates. Bidirectional conversion with quadrant visualization, unit circle reference, and batch table.
Pythagorean Triples Generator & Checker — Generate Pythagorean triples up to any limit, find triples containing a given number, and check whether three numbers form a valid Pythagorean triple.
Reference Angle Calculator — Find the Reference Angle — Find the reference angle for any angle in degrees or radians. Shows coterminal angle, quadrant, trig values, ASTC sign chart, and unit circle visualization.
Rectangular to Polar Coordinates Calculator — Convert rectangular (x, y) to polar (r, θ) coordinates in degrees, radians, or gradians. Quadrant detection, batch mode, visual plot, and reference table.
Sine Calculator (sin θ) — Calculate the sine of any angle in degrees, radians, or gradians. Shows all 6 trig functions, quadrant analysis, exact values, sine wave visual, and reference table.
Secant Calculator — sec(θ) with Full Trig Breakdown — Calculate sec(θ) = 1/cos(θ) in degrees, radians, or gradians. All 6 trig functions, identity verification, asymptote warnings, sign chart, and common values.
sin(2θ) Double Angle Calculator — Calculate sin(2θ) using the double-angle formula 2·sin(θ)·cos(θ). Step-by-step solution, identity verification, projectile range, and triangle area applications.
Inverse Sine Calculator (arcsin / sin⁻¹) — Calculate arcsin (sin⁻¹) of any value from −1 to 1. Shows result in degrees, radians, gradians, general solution, domain check, and common values reference.
Sin Cos Tan Calculator — All 6 Trig Functions — Calculate sin, cos, tan, csc, sec, and cot of any angle. Shows quadrant analysis, ASTC rule, Pythagorean identity check, full 0°–360° reference table, and exact values.
Sin in Degrees Calculator — Calculate the sine of any angle in degrees. Shows radians equivalent, all 6 trig functions, sine curve visual, common values table, and custom range generator.
Sin Theta Calculator — sin(θ) Exact & Decimal Values — Calculate sin(θ) for any angle with exact values, Taylor series approximation, all 6 trig functions, quadrant visual, and standard angle reference table.
Singular Value Decomposition (SVD) Calculator — Compute singular values of 2×2 and 3×3 matrices. Shows σ₁, σ₂, σ₃, condition number, rank, Frobenius norm, and step-by-step eigenvalue decomposition.
Standard Notation Converter — All Number Formats — Convert between standard notation, scientific, engineering, hexadecimal, and word forms. Shows place value breakdown, SI prefix reference, and magnitude comparison.
Tanh Calculator (Hyperbolic Tangent) — Calculate tanh(x) and all six hyperbolic functions. Compare tanh vs sigmoid, verify identities, explore common values with visual saturation curves.
Trigonometry Calculator (All Functions) — Calculate all 6 trig functions, reciprocals, and inverses for any angle. Quadrant analysis, unit circle visual, and special angles reference table.
Trigonometry Degree Calculator (DMS & Decimal) — Calculate trig functions for degree inputs. Convert between DMS and decimal degrees, generate range tables, and reference common angle values.
Trig Identities Calculator & Verifier — Verify 24+ trig identities for any angle. Pythagorean, reciprocal, double angle, half angle, sum/product formulas with pass/fail status and error analysis.
Union & Intersection Calculator (Set Operations) — Calculate union, intersection, difference, and symmetric difference of two sets. Venn diagram, Jaccard similarity, power set size, and complement analysis.
Trigonometry Calculator — Solve Any Triangle — Solve right and oblique triangles. Enter sides and angles to find all unknowns, area, circumradius, and inradius. SSS, SAS, ASA, AAS, SSA modes included.