     Intro Using Trigonometry Definitions Functions Radiens Modifying Curves Adding Curves

Playground

Rapunzel

Dido's Problem

Pythagoras

Trigonometry

Smart Joe

Fuzzy Logic

Cryptography

Mathematicians  Of course, the tangent is not the only useful ratio. Other ratios have been defined too. So here are some more definitions :

In a right triangle the sine (or sin for short) of an acute angle is defined as the ratio between the side opposite it and the hypotenuse. Look at the figure on the right where sin(A)=BC/AC.

The cosine (or cos for short) of an angle is defined as the ratio between the leg right next to the angle and the hypotenuse. In the triangle on the right you see cos(A)=AB/AC.

The last one is the cotangent (or cot for short). It is defined as the ratio between the leg right next to the angle and the leg opposite of the angle. So you have cot(A)=AB/BC.

Note that the cotangent is the inverse of the tangent. That means that if the tangent of an angle has a value of 1/2, then the cotangent has a value of 2/1.    