TRIGONOMETRY

In trigonometry, trigonometric ratios are derived from the sides of a right-angled triangle. These include ratios such as sine, cosine, tangent.

These are defined for acute angle $A$A below:

$\maroonC{\text{adjacent}}$$\blueD{\text{opposite}}$$\purpleC{\text{hypotenuse}}$$\sin (A) = \dfrac{\blueD{\text{opposite}}}{\purpleC{\text{hypotenuse}}}$$\cos (A) = \dfrac{\maroonC{\text{adjacent}}}{\purpleC{\text{hypotenuse}}}$$\tan (A) = \dfrac{\blueD{\text{opposite}}}{\maroonC{\text{adjacent}}}$$A$$B$$C$