Trigonometry Calculators

Calculate cosine, degree radian converter and inverse trigonometry and other trigonometry calculations.

Popular:Cosine CalculatorDegree Radian ConverterInverse Trigonometry CalculatorSine CalculatorTangent CalculatorTrigonometry Calculator

All Trigonometry Calculators

Cosine CalculatorCalculate the cosine of an angle, in degrees or radians.Degree Radian ConverterConvert an angle between degrees and radians, in either direction.Inverse Trigonometry CalculatorCalculate the angle from a sine, cosine, or tangent value — arcsin, arccos, or arctan.Sine CalculatorCalculate the sine of an angle, in degrees or radians.Tangent CalculatorCalculate the tangent of an angle, in degrees or radians.Trigonometry CalculatorCalculate the sine, cosine, or tangent of an angle, in degrees or radians.

Trigonometry Guides

Mathematics1 min read

How Inverse Trigonometric Functions Find an Angle

Arcsine, arccosine, and arctangent reverse the usual trigonometric question — instead of turning an angle into a ratio, they turn a ratio back into the angle that produced it.

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Mathematics1 min read

How Sine, Cosine, and Tangent Are Calculated

Sine, cosine, and tangent each take an angle and return a ratio — computed by first converting the angle to radians if it was entered in degrees, then applying the corresponding trigonometric function.

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Mathematics1 min read

Why Trigonometric Functions and Their Inverses Are Exact Round Trips

Taking the sine of 30° gives exactly 0.5, and taking the arcsine of that exact 0.5 gives back exactly 30° — trigonometric functions and their inverses always undo each other precisely, within the range where the inverse is defined.

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