### INTRODUCTION

This is a series of tutorial for programmers who do not have previous
experience in trigonometry.

### WHAT IS TRIGONOMETRY?

Trigonometry is the study of the ratios of the lengths of the sides of
different triangles. In this tutorial I assume that you already know what a
triangle is.

### THE HYPOTENUSE

The hypotenuse is the side of the triangle opposite the right angle.

/|
/ | A is the hypotenuse
A / | BC is a right angle
/ | B
/ |
/ |
------------|
C

### PYTHAGORAS' THEORY

In a right angled triangle, the size of the square of the hypotenuse is equal
to the square of the sum of the other two sides.

|\
| \ B is the hypotenuse
| \ B AC is a right angle
A | \
| \
| \
|------------
C

### OTHER SIDES OF THE TRIANGLE

Besides the hypotenuse, there are also two other sides to any triangle, the
opposite and the adjacent. The opposite is opposite of the side opposite of
the angle being measured, and the adjacent is the side adjacent the angle
being measured. Now how hard can that be? : -)

/|
/ | A is the hypotenuse
/ | BC is a right angle
A / | B/C is the opposite/adjacent
/ | B if the angle is AB,
/ | B is the adjacent & C is the opposite
/ | if the angle is AC,
--------------| C is the adjacent & B is the opposite
C

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Copyright (C) 2000 Lionel Pinkhard. All Rights Reserved.
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