Programmed Math/Cosine

Cosine in trigonometry is the adjacent divided hypotenuse, in the form of $\cos \theta =\frac{a}{h}$ An equation with Cosine would be the following when the adjacent is equal to 5 and the hypotenuse is equal to 10: $\cos \theta =\frac{a}{h}$ = $\cos \theta =\frac{5}{10}=.877562$

Cosine is usually used for triangle with the angle in the corner of lower point of the hypotenuse.