# cos 0 is equal to

#### Understand the Problem

The question is asking for the value of the cosine function evaluated at 0 degrees or 0 radians. This is a fundamental concept in trigonometry.

The value of $\cos(0)$ is $1$.

The value of cosine at 0 degrees is $1$.

#### Steps to Solve

1. Recall the definition of cosine The cosine function in trigonometry is defined based on the unit circle. For an angle of 0 degrees (or 0 radians), the coordinates of the corresponding point on the unit circle are $(1, 0)$.

2. Identify the cosine value The cosine of an angle in the unit circle corresponds to the x-coordinate of the point. Therefore, for an angle of 0 degrees: $$\cos(0) = 1$$

3. Conclusion Since we have established that the x-coordinate for 0 degrees is 1, we conclude the evaluation of the cosine.

The value of cosine at 0 degrees is $1$.

The cosine function is periodic and symmetrical. The value of $\cos(0)$ being 1 is a key point that underpins many concepts in trigonometry and is often used as a reference when dealing with other angles.