Trigonometric Ratios
The ratios of the different sides of a right triangle are called trigonometric ratios.
The trigonometric ratio called cosine is defined as the adjacent leg divided by the hypotenuse.
If we use the angle of 10°, the adjacent leg is 67 and the hypotenuse is x, thus
[tex]\cos 10=\frac{67}{x}[/tex]Solving for x we can have the answer to the problem