Trigonometry Calculator

  • Half Angle Calculator
    Compute sin(θ/2), cos(θ/2), and tan(θ/2) from any angle θ in degrees using the trigonometric half-angle identities. Fast, exact, free.
  • 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.
  • 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.
  • 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 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.
  • 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.
  • Angle Between Two Vectors Calculator
    Find the angle between two 2D or 3D vectors using the dot product. Get the result in degrees and radians plus magnitudes and cosine.
  • Azimuth (Bearing) Calculator
    Calculate the initial azimuth (forward bearing) between two latitude/longitude points using the great-circle formula. Returns degrees from true north plus compass point.
  • Angle of Elevation Calculator
    Find the angle of elevation from height and horizontal distance. Calculates the angle in degrees and radians plus the line-of-sight length.
  • 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.
  • 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.
  • Angle of Impact Calculator
    Calculate the angle of impact of a bloodstain from its width and length using arcsin(width/length). Free forensic bloodstain pattern analysis tool.
  • 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.
  • Angle Unit Conversion Calculator
    Convert any angle between degrees, arcminutes, arcseconds, DMS, gradians, radians, mils and slope %/permil. Uses the 6400-mil circle convention.
  • 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.
  • 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.
  • 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.
  • ASA Triangle Calculator
    Solve an ASA triangle from two angles and the included side. Get the third angle, all sides, perimeter, and area using the law of sines.
  • Cos Inverse (arccos) Calculator
    Compute the inverse cosine (arccos) of any value from -1 to 1. Get the angle θ = acos(x) instantly in both radians and degrees.
  • Sin⁻¹ (Arcsine) Calculator
    Calculate the inverse sine (arcsine) of a value between -1 and 1. Get arcsin(x) instantly in both degrees and radians with this free online tool.

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