Calculadora de Seno
- Created by
- Renato Passos, Eng. de Software
- Reviewed by
- Renato Passos, Eng. de Software
Last updated: Apr 18, 2026
Formula
sen(θ) — com θ em graus
About this calculator
This sine calculator was designed to make it easy to calculate the sine of an angle in degrees. Simply enter the angle value and the result is displayed instantly. It is a useful tool for students, teachers, and professionals who need to solve trigonometry problems quickly and accurately.
The sine of an angle is a fundamental trigonometric function that relates the length of the opposite side to the hypotenuse in a right triangle. The formula used is sin(θ), where θ is the angle in degrees. Internally, the calculator converts degrees to radians and applies the sine function to obtain the result.
You can use this calculator in various situations, such as math, physics, or engineering exercises involving waves, oscillations, circular motion, or triangulation. For example, when calculating the height of a building from a distance and angle, the sine is essential.
Important precautions: make sure the angle is in degrees, as the calculator does not automatically convert radians. Also, remember that the sine of very large or negative angles follows the periodic properties of the function, with values between -1 and 1.
Frequently asked questions
How to use the sine calculator?
Enter the angle value in degrees in the indicated field and click Calculate. The sine result will be displayed automatically.
Can I enter angles in radians?
No, the calculator only accepts angles in degrees. If you have a value in radians, convert to degrees first (multiply by 180/π).
What does the result mean?
The result is the sine value of the angle, ranging between -1 and 1. It represents the ratio of the opposite side to the hypotenuse in a right triangle.
Why is the sine of 90 degrees equal to 1?
On the unit circle, the 90-degree angle corresponds to the point (0,1), where the y-coordinate is 1, which is the sine.
Does the calculator work for negative angles?
Yes, negative angles are accepted. The sine of a negative angle is the negative of the sine of the corresponding positive angle.