Trigonometry Calculator

  • Unit Circle Calculator
    Find the (x, y) coordinates on the unit circle for any angle in degrees or radians. Computes cos θ, sin θ, and tan θ instantly.
  • Power Reducing Calculator
    Apply the power-reducing trig identities to find sin²θ, cos²θ and tan²θ from any angle in degrees or radians. Free, instant, step-shown results.
  • Inverse Trigonometric Functions Calculator
    Compute arcsin, arccos and arctan online. Enter a value to find the angle θ in both degrees and radians instantly with this free calculator.
  • Sum and Difference Identities Calculator
    Compute sin(a±b) and cos(a±b) instantly using the trigonometric sum and difference identities. Enter angles in degrees or radians.
  • Phase Shift Calculator
    Calculate the phase shift, period, amplitude, and vertical shift of a sine or cosine function y = A·sin(Bx − C) + D instantly.
  • Cotangent Calculator
    Calculate the cotangent of any angle in degrees or radians. Uses cot(θ) = cos(θ)/sin(θ) = 1/tan(θ) with instant, accurate results.
  • Cofunction Calculator
    Find the cofunction of any trig ratio using the complementary angle. Convert sin↔cos, tan↔cot, sec↔csc for angles in degrees or radians.
  • Scalene Triangle Solver Calculator
    Solve any general triangle from 14 input combinations of sides, angles, height or area. Get all three sides, all angles, the altitude and area instantly.
  • Hyperbolic Functions Table Calculator
    Generate a table of sinh(x), cosh(x) and tanh(x) over any range of x with a chosen step and display precision. Free hyperbolic function table tool.
  • Trigonometric Functions Calculator (Degrees)
    Compute sin, cos, tan, csc, sec and cot of an angle in degrees. Accepts decimal degrees or degrees-minutes-seconds (DMS) like 5'12'6. Free trig calculator.
  • Inverse Trigonometric Functions Calculator (Result in Degrees)
    Compute arcsine, arccosine, arctangent, arccosecant, arcsecant and arccotangent of x, with the angle returned in decimal degrees and degrees-minutes-seconds.
  • Inverse Hyperbolic Functions Calculator
    Compute all six inverse hyperbolic functions of x: sinh, cosh, tanh, csch, sech and coth inverses, with exact logarithmic formulas and domain notes.
  • Inverse Trigonometric Functions (Radians) Calculator
    Compute arcsine, arccosine, arctangent, arccosecant, arcsecant and arccotangent of a real number x. Principal values returned in radians.
  • Trigonometric Functions Calculator (Radians)
    Compute sin, cos, tan, csc, sec and cot of an angle in radians. Enter a number or an expression like pi/6 or 2pi. Free, instant, and precise.
  • Hyperbolic Functions Calculator
    Compute all six hyperbolic functions sinh, cosh, tanh, csch, sech and coth of a real number x instantly, with formulas and a worked example.
  • Trigonometric Function Table (sin, cos, tan) with Graph
    Generate a table of sin, cos and tan values across an angle range in degrees, stepping by a chosen increment, and plot the sin and cos curves.
  • Right Triangle Solver
    Solve a right triangle from any two known elements. Enter base, height, hypotenuse, base angle or area and get all remaining sides, the angle and area.
  • Machin-like Four-Term Pi Calculator
    Compute pi using six historical four-term Machin-like arctangent formulas (Gauss, Stormer, Escott, Takano, Murata, Shibata). Universal math tool, double precision.
  • Pi Calculator: Three-Term Machin-like ATAN Formulas
    Compute pi using classic three-term Machin-like arctangent formulas (Klingenstierna, Strassnitzky, Gauss, Stormer) via the Gregory atan series.
  • Angle Unit Conversion Calculator
    Convert any angle between degrees, arcminutes, arcseconds, DMS, gradians, radians, mils and slope %/permil. Uses the 6400-mil circle convention.
  • Decimal Degrees to Degrees-Minutes-Seconds (DMS) Converter
    Convert decimal degrees into degrees, minutes and seconds (DMS) instantly. Handles negative and fractional angles for surveying, machining and map coordinates.
  • Degrees-Minutes-Seconds (DMS) to Decimal Degrees Converter
    Convert an angle in degrees, minutes and seconds (DMS) to decimal degrees instantly. Useful for surveying, engineering, navigation and astronomy.
  • Spherical Hankel Function Table Calculator
    Tabulate spherical Hankel functions of the first and second kind h_v(x) and their derivatives, with real and imaginary parts and magnitude, over a range of x.
  • Triangle Angles from Three Sides Calculator
    Compute all three interior angles of a triangle from its side lengths, in decimal degrees and degrees-minutes-seconds, plus the height and area via Heron's formula.

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