Enter the adjacent length and the hypotenuse length into the COS Ratio Calculator. The calculator will evaluate and display the COS Ratio. 

COS Ratio Formula

The following formula is used to calculate the COS Ratio. 

COSR = A / H
  • Where COSR is the COS Ratio ( )
  • A is the adjacent length 
  • H is the hypotenuse length 

To calculate the COS ratio, divide the adjacent length by the hypotenuse length.

How to Calculate COS Ratio?

The following example problems outline how to calculate COS Ratio.

Example Problem #1:

  1. First, determine the adjacent length.
    • The adjacent length is given as: 8.
  2. Next, determine the hypotenuse length.
    • The hypotenuse length is provided as: 10.
  3. Finally, calculate the COS Ratio using the equation above: 

COSR = A / H

The values given above are inserted into the equation below and the solution is calculated:

COSR = 8 / 10 = .80

Example Problem #2: 

For this problem, the variables required are provided below:

adjacent length = 9

hypotenuse length = 15

Test your knowledge using the equation and check your answer with the calculator above.

COSR = A / H = ?