cos(a/2)
- Created by
- Renato Passos, Eng. de Software
- Reviewed by
- Renato Passos, Eng. de Software
Last updated: Apr 18, 2026
Formula
meio ângulo
About this calculator
The Cosine Half Angle Calculator is an online tool that calculates the value of the cosine of an angle divided by two. It uses the formula ±√((1+cos a)/2) to calculate the result.
This calculator is particularly useful for advanced trigonometry problems, where it is necessary to calculate the cosine of angles greater or less than 90 degrees.
In addition, this calculator can be used to verify the results of manually calculated values, helping to avoid errors and ensure the accuracy of calculations.
Remember to use this calculator with caution, especially when dealing with very large or very small values, as this can affect the accuracy of the result.
Frequently asked questions
What is the cosine half angle?
The cosine half angle is a concept in trigonometry that refers to the value of the cosine of an angle divided by two. It is used to calculate the length of line segments and solve advanced trigonometry problems.
How do I use this calculator?
Simply enter the desired angle value and click the calculate button. The calculator will then calculate the corresponding cosine half angle value.
What is the formula used by this calculator?
The calculator uses the formula ±√((1+cos a)/2) to calculate the cosine half angle value.
Can I use this calculator for physics problems?
Yes, this calculator can be used to solve physics problems that involve advanced trigonometry, such as mechanics and optics problems.
Is it safe to use?
Yes, this calculator is safe to use, as long as you have access to a stable internet connection and a machine with sufficient resources to perform the calculation.