- Fraction Calculator
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Cosh (Hyperbolic Cosine) CalculatorCompute the hyperbolic cosine cosh(x) = (e^x + e^-x)/2 for any real number x instantly with this free online cosh calculator.
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Cos Inverse (arccos) CalculatorCompute the inverse cosine (arccos) of any value from -1 to 1. Get the angle θ = acos(x) instantly in both radians and degrees.
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Complex Number to Rectangular Form CalculatorConvert a complex number from polar form (r, θ) to rectangular form a + bi. Enter magnitude and angle in degrees or radians for instant results.
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Triangle Area Calculator (SAS)Calculate the area of a triangle from two sides and their included angle (SAS) using Area = ½·a·b·sin(C). Fast, accurate, free.
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Complex Number to Trigonometric Form CalculatorConvert a complex number a + bi to trigonometric (polar) form r(cos θ + i sin θ). Get the modulus r and argument θ in degrees and radians instantly.
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Complex Number to Polar Form CalculatorConvert a complex number a + bi to polar form. Get magnitude r and angle θ in degrees and radians instantly, with the full formula explained.
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ASA Triangle CalculatorSolve an ASA triangle from two angles and the included side. Get the third angle, all sides, perimeter, and area using the law of sines.
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Triangle Angle CalculatorFind all three angles of a triangle from its three side lengths using the law of cosines. Free SSS triangle angle calculator with worked example.
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45-45-90 Triangle CalculatorSolve a 45-45-90 right triangle instantly. Enter a leg or the hypotenuse to get the other side, area and perimeter using the x, x, x√2 ratio.
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Right Triangle Side and Angle CalculatorFind the hypotenuse, angles, area and perimeter of a right triangle from its two legs using the Pythagorean theorem and trigonometry.
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30 60 90 Triangle CalculatorSolve any 30-60-90 right triangle. Enter one side to instantly find the other two sides, area, and perimeter using the 1 : √3 : 2 ratio.
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Reference Angle CalculatorFind the reference angle of any angle in degrees or radians. Instantly see the normalized angle, its quadrant, and the acute reference angle.
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Angle Between Two Vectors CalculatorFind the angle between two 2D or 3D vectors using the dot product. Get the result in degrees and radians plus magnitudes and cosine.
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Supplementary Angles CalculatorFind the supplementary angle instantly. Enter any angle in degrees and get its supplement using supplement = 180 − angle. Free, fast, and accurate.
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Clock Angle CalculatorCalculate the exact angle between the hour and minute hands of an analog clock for any time using the standard 30H − 5.5M formula.
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Coterminal Angle CalculatorFind coterminal angles in degrees or radians. Get the smallest positive and negative coterminal angles using angle ± 360°n or ± 2πn.
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Central Angle CalculatorFind the central angle of a circle from arc length and radius. Get the angle instantly in both radians and degrees with this free calculator.
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Complementary Angles CalculatorFind the complementary angle instantly. Enter any angle and get its complement (90 − angle) in degrees. Free, accurate geometry calculator.
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Angle of Right Triangle CalculatorFind the acute angle of a right triangle from any two sides using arctan, arcsin, or arccos. Get the result in degrees and radians instantly.
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AAS Triangle CalculatorSolve an AAS triangle from two angles and one side. Computes the third angle, both missing sides, perimeter, and area using the law of sines.
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Area of an Oblique Triangle CalculatorFind the area of any oblique triangle from two sides and the included angle using Area = ½·a·b·sin(C). Fast, accurate SAS area calculator.
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Involute Function CalculatorCalculate the involute function inv(α) = tan(α) − α for any angle in degrees or radians. Essential for gear and spline tooth geometry design.
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Half Angle CalculatorCompute 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.
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Double Angle Formula CalculatorCompute sin(2θ), cos(2θ), and tan(2θ) from any angle in degrees or radians using the trigonometric double-angle identities, instantly.
