# What is tan 180°?

Tangent function is defined as the ratio of the opposite side to the adjacent side of a specific angle of a right-angled triangle.

## Answer: The value of tan 180° is 0.

To find the value of tan 180° we will use the trigonometric formula tan θ = sin θ / cos θ

**Explanation:**

The value of sin 180° = 0

Also, the value of cos 180° = -1

So, tan 180° = sin 180° / cos 180°

= 0 / (-1)

= 0