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Free online trigonometry calculators. Fast, accurate, and always free to use.
Use our free sine calculator to find the sine (sin) of any angle. Supports degrees and radians.
Use our free cosine calculator to find the cosine (cos) of any angle. Supports degrees and radians.
Use our free tangent calculator to find the tangent (tan) of any angle. Supports degrees and radians.
Use our free cotangent calculator to find the cotangent (cot) of any angle. Supports degrees and radians.
Use our free secant calculator to find the secant (sec) of any angle. Supports degrees and radians.
Use our free cosecant calculator to find the cosecant (csc) of any angle. Supports degrees and radians.
Use our free inverse trigonometric calculator to find arcsin, arccos, or arctan of a value. Supports degrees and radians.
Use our free trigonometric identity calculator to compute sin, cos, tan, cot, sec, csc and verify sin²θ + cos²θ = 1.
Use our free right triangle solver to find all sides (a, b, c) and angles (A, B) of a right triangle. Enter any two known values.
Use our free law of sines calculator to solve any triangle. Supports AAS, ASA, and SSA input modes.
Use our free law of cosines calculator to solve any triangle. Supports SSS (three sides) and SAS (two sides + included angle).
Use our free angle calculator to find the missing angle in a triangle, or compute complementary (90° - θ) and supplementary (180° - θ) angles.
Use our free degree to radian converter to convert any angle from degrees to radians.
Use our free radian to degree converter to convert any angle from radians to degrees.
Addition, subtraction, multiplication, and division calculators.
Simplify, compare, and calculate with fractions.
Decimal conversion, rounding, and arithmetic calculators.
Calculate powers, square roots, and nth roots.
Solve equations, inequalities, and algebraic expressions.
Area, volume, perimeter, and shape calculators.
Mean, median, mode, standard deviation, and more.
Prime numbers, factorization, factors, multiples, and LCM calculators.
Binary, decimal, and hexadecimal converters and arithmetic.
Arithmetic and geometric sequences and series.
Matrix operations, determinants, and inverses.
Derivatives, integrals, and limits calculators.
Complex number arithmetic and conversions.
Vector operations, eigenvalues, and linear systems.
Round numbers to specified precision and significant figures.
Odd math tools and general-purpose calculators.