Arccot Formula

Arccot formula is used in trigonometry, where the cotangent is defined as the ratio of the adjacent side to the opposite side of a specific angle of a right-angled triangle whereas arccot is the inverse of the cotangent function. Arccot is also known as cot^-1. The arccot formula is explained along with the solved examples below.

What is Arccot Formula?

The basic arccot formula can be written as:

$θ =  \text{arccot} \left(\dfrac{\text{adjacent}}{\text{opposite}}\right)$

The graph of Arccot is shown below:

Examples Using Arccot Formula

Example 1: In the right-angled triangle DEF, if the base of the triangle is 34 and the height is 22. Find the base angle.

Solution:

To find: θ

Using the arccot formula,

$θ =  \text{arccot} \left(\dfrac{\text{adjacent}}{\text{opposite}}\right)$
$θ = \text{arccot} \left( \dfrac{34}{22}\right) = 32.998^\circ$

Answer: Therefore, θ = 32.998^o.

Example 2: In the right-angled triangle XYZ, if the base of the triangle is 4 and the height is 3. Find the base angle.

Solution:

To find: θ

Using the arccot formula,

$θ =  \text{arccot} \left(\dfrac{\text{adjacent}}{\text{opposite}}\right)$
$θ = \text{arccot} \left(\dfrac{4}{3}\right) = 36.877^\circ$

Answer: Hence, the value of c is 1.