tan(a+b)
- Created by
- Renato Passos, Eng. de Software
- Reviewed by
- Renato Passos, Eng. de Software
Last updated: Apr 18, 2026
Formula
tan soma
About this calculator
The Tangent Sum Calculator is a useful online tool for calculating the tangent of the sum of two angles. It uses the mathematical formula (tan a + tan b)/(1 − tan a·tan b), which is an expansion of the tangent sum identity.
This calculator is especially useful when you need to calculate the tangent of an angle that is not a standard measure, such as 30° or 45°. With this tool, you can simply enter the two angles and get the result.
Please note that this calculator is based on an advanced mathematical formula and may not be suitable for all cases. For example, if you are working with very large or very small angles, the accuracy may be affected.
Frequently asked questions
What is the formula used by the calculator?
The formula used by the calculator is (tan a + tan b)/(1 − tan a·tan b), which is an expansion of the tangent sum identity.
Can I use this calculator to calculate the tangent of very large or very small angles?
No, it is recommended to avoid using this calculator for very large or very small angles, as the accuracy may be affected.
When is this calculator useful?
This calculator is useful when you need to calculate the tangent of the sum of two angles, especially when the angles are not standard measures.