Trigonometry Calculator

  • Tanh Function First Derivative Calculator
    Compute tanh(x) and its first derivative tanh'(x) = 1 - tanh(x)^2 (plus the second derivative) at any real x. Ideal for neural-network activation math.
  • 3D Coordinate Rotation Calculator
    Rotate a 3D point about the X, Y or Z axis with right-hand-rule rotation matrices. Apply up to three sequential rotations in degrees or radians.
  • Coordinate Rotation About the Origin Calculator
    Rotate a 2D point about the origin by any angle. Enter x, y and the rotation angle in degrees or radians to get the new coordinates instantly.
  • Inverse Jacobi Elliptic Function arcsn(x, k)
    Compute the inverse Jacobi elliptic sine arcsn(x, k): the value u with sn(u,k)=x, via the incomplete elliptic integral of the first kind F(arcsin x, k).
  • Trig Triangle Calculator
    Solve a triangle from two sides and the included angle (SAS) using the law of cosines and law of sines. Finds the third side, angles, area, and perimeter.
  • Trigonometric Function Calculator
    Calculate sin, cos, tan, csc, sec and cot for any angle in degrees or radians. Free, instant trigonometric function calculator with formulas.
  • Jacobi cd(u,k) Elliptic Function Calculator
    Compute the Jacobi elliptic function cd(u,k) = cn/dn for any argument u and modulus -1 to 1, using a high-precision AGM algorithm. Free and universal.
  • Jacobi nd Elliptic Function Calculator
    Compute the Jacobi elliptic function nd(u, k) = 1/dn(u, k) for a real argument u and modulus k using the AGM descending Landen transformation.
  • Sine Function Calculator
    Evaluate the general sine function y = A·sin(B(x − C)) + D for any x, with amplitude, period, and midline. Supports radians or degrees.
  • Sinh (Hyperbolic Sine) Calculator
    Calculate the hyperbolic sine sinh(x) of any real number instantly using the exact formula (eˣ − e⁻ˣ)/2. Free, accurate, and easy to use.
  • Law of Sines Triangle Calculator
    Solve a triangle with the Law of Sines. Enter side a, angle A and angle B to find angle C, sides b and c, plus perimeter and area.
  • Sin Theta Calculator
    Calculate sin(θ) for any angle in degrees or radians. Fast, free sine calculator with exact step-by-step values and radian conversion.
  • Sine Cosine Tangent Calculator
    Calculate sine, cosine, and tangent of any angle in degrees or radians. Free sin cos tan calculator with formula and worked examples.
  • Sin Degrees Calculator
    Calculate the sine of an angle given in degrees. Enter θ in degrees and get sin(θ) instantly, with the angle converted to radians.
  • Sin 2 Theta Calculator
    Calculate sin(2θ) instantly using the double-angle identity sin(2θ) = 2·sinθ·cosθ. Enter your angle in degrees or radians.
  • 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.
  • SAS Triangle Calculator
    Solve a triangle from two sides and the included angle (SAS). Find the third side with the Law of Cosines, plus area and remaining angles.
  • Right Triangle Trigonometry Calculator
    Solve a right triangle from its two legs: get the hypotenuse, sin, cos, tan, both acute angles, area and perimeter instantly with steps.
  • Rectangular to Polar Coordinates Calculator
    Convert rectangular (x, y) coordinates to polar (r, θ) form instantly. Computes radius r = √(x²+y²) and angle θ = atan2(y, x) in degrees and radians.
  • Triangle Side and Angle Calculator
    Solve a triangle from two sides and the included angle (SAS). Find the third side, remaining angles, perimeter and area using the Law of Cosines and Sines.
  • Trapezoid Angle Calculator
    Calculate the base and top angles of a trapezoid leg from its height and horizontal offset, plus the slanted leg length. Free online geometry tool.
  • SSA Triangle Calculator (Law of Sines)
    Solve SSA triangles with the Law of Sines. Enter two sides and a non-included angle to find angle B, angle C, side c, and the number of triangles.
  • Theta (Angle) Calculator
    Calculate the angle theta (θ) of a right triangle from its opposite and adjacent sides using atan2. Get the result in degrees and radians instantly.
  • SSS Triangle Calculator
    Solve any triangle from its three sides (SSS) using the Law of Cosines. Get all three angles, perimeter, and area instantly with worked steps.

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