Trigonometry Calculators

Sine / Cosine / Tangent

Compute values for any angle.

Inverse Trig

Arcsin, arccos, arctan.

Law of Sines

Solve triangles with angles/sides.

Law of Cosines

Find unknown sides or angles.

Angle Conversion

Degrees ↔ Radians ↔ Gradians.

Triangle Solver

SAS, ASA, SSS, SSA.

Unit Circle

Coordinates and angles.

Trig Identities

Verify common identities.

Periodic Functions

Amplitude, period, phase.

Triangle Area (Trig)

Using sides and angle.

Trig Equation Solver

Solve basic equations.

Sample Angle Problems

Practice & checks.

Graph Trig Functions

Plot sine, cosine, etc.

Trig Approximations

Small-angle & Taylor.

Angle Between Vectors

Using dot product.

Hyperbolic Functions

sinh, cosh, tanh values.

Spherical Trigonometry

Law of sines/cosines on sphere.

Polar Coordinates

Convert to/from Cartesian.

Radians to Degrees

Instant conversion tool.

Cot / Sec / Csc

Reciprocal trig functions.

Secant Function

1/cos values & graph.

Cosecant Function

1/sin values & graph.

Half-Angle Formulas

sin(θ/2), cos(θ/2), tan(θ/2).

Sum & Difference

sin(A±B), cos(A±B).

Double Angle

sin(2θ), cos(2θ), tan(2θ).

Product-to-Sum

sinA·cosB → sum.

Fourier Coefficients

a₀, aₙ, bₙ from data.

Complex Trig

Euler's formula & cis(θ).

Direction Cosines

Vector direction in 3D.

Bearing & Azimuth

Navigation angle conversion.