Calculadora de Tangente
- Created by
- Renato Passos, Eng. de Software
- Reviewed by
- Renato Passos, Eng. de Software
Last updated: Apr 18, 2026
Formula
tan(θ) — com θ em graus
About this calculator
The Tangent Calculator is an online tool that calculates the tangent of an angle in degrees. Tangent is a fundamental trigonometric function, defined as the ratio of the sine to the cosine of an angle. In a right triangle, the tangent of an acute angle equals the length of the opposite side divided by the length of the adjacent side. This calculator uses the tangent function directly, converting the angle from degrees to radians internally.
To use the calculator, simply enter the angle in degrees in the input field and click 'Calculate'. The result is displayed immediately, showing the tangent value. For example, the tangent of 45 degrees is 1. It is important to note that tangent is undefined for angles where cosine is zero, such as 90 degrees and 270 degrees, as the function tends to infinity in those cases.
This calculator is useful for mathematics students, engineers, architects, and professionals who need to perform trigonometric calculations quickly. It can be applied in geometry, physics, navigation, and various engineering fields. When using the tool, ensure the angle is in degrees, not radians, to obtain the correct result. If you need to work with radians, convert them to degrees before entering.
Frequently asked questions
What is the tangent of an angle?
The tangent of an angle is a trigonometric function that represents the ratio of the sine to the cosine of that angle. In a right triangle, it is the ratio of the opposite side to the adjacent side.
How to calculate the tangent of 30 degrees?
Enter 30 in the degrees field and click 'Calculate'. The result will be approximately 0.57735, which is the square root of 3 divided by 3.
Why is the tangent of 90 degrees undefined?
The tangent of 90 degrees is undefined because the cosine of 90 degrees is zero, and division by zero is not possible. The function tends to infinity at that point.
Does this calculator work with angles in radians?
No, the calculator only accepts angles in degrees. If you have an angle in radians, convert it to degrees by multiplying by 180/π before using.
What is the tangent of 0 degrees?
The tangent of 0 degrees is 0, since the sine of 0 is 0 and the cosine is 1.