Trigonometric Values

Trigonometry is a branch of mathematics that studies relationships between side lengths and angles of triangles.

The Basics

The three primary trigonometric functions are sine, cosine, and tangent.

• Sine (sin): The ratio of the length of the side opposite the angle to the length of the hypotenuse. $$ \sin(\theta) = \frac{\text{Opposite}}{\text{Hypotenuse}} $$
• Cosine (cos): The ratio of the length of the adjacent side to the length of the hypotenuse. $$ \cos(\theta) = \frac{\text{Adjacent}}{\text{Hypotenuse}} $$
• Tangent (tan): The ratio of the length of the opposite side to the length of the adjacent side. $$ \tan(\theta) = \frac{\text{Opposite}}{\text{Adjacent}} $$

Common Angles

Here is a table of trigonometric values for common angles: